The following is a simple list of prayers uttered throughout the ages by Old Testament saints

Jacob – Genesis 32

22 That night Jacob got up and took his two wives, his two maidservants and his eleven sons and crossed the ford of the Jabbok. 23 After he had sent them across the stream, he sent over all his possessions. 24 So Jacob was left alone, and a man wrestled with him till daybreak. 25 When the man saw that he could not overpower him, he touched the socket of Jacob's hip so that his hip was wrenched as he wrestled with the man. 26 Then the man said, "Let me go, for it is daybreak." But Jacob replied, "I will not let you go unless you bless me." 27 The man asked him, "What is your name?" "Jacob," he answered. 28 Then the man said, "Your name will no longer be Jacob, but Israel, [5] because you have struggled with God and with men and have overcome." 29 Jacob said, "Please tell me your name." But he replied, "Why do you ask my name?" Then he blessed him there. 30 So Jacob called the place Peniel, [6] saying, "It is because I saw God face to face, and yet my life was spared."

Moses Exodus 33

12 Moses said to the LORD, "You have been telling me, 'Lead these people,' but you have not let me know whom you will send with me. You have said, 'I know you by name and you have found favor with me.' 13 If you are pleased with me, teach me your ways so I may know you and continue to find favor with you. Remember that this nation is your people." 14 The LORD replied, "My Presence will go with you, and I will give you rest." 15 Then Moses said to him, "If your Presence does not go with us, do not send us up from here. 16 How will anyone know that you are pleased with me and with your people unless you go with us? What else will distinguish me and your people from all the other people on the face of the earth?" 17 And the LORD said to Moses, "I will do the very thing you have asked, because I am pleased with you and I know you by name." 18 Then Moses said, "Now show me your glory." 19 And the LORD said, "I will cause all my goodness to pass in front of you, and I will proclaim my name, the LORD , in your presence. I will have mercy on whom I will have mercy, and I will have compassion on whom I will have compassion. 20 But," he said, "you cannot see my face, for no one may see me and live." 21 Then the LORD said, "There is a place near me where you may stand on a rock. 22 When my glory passes by, I will put you in a cleft in the rock and cover you with my hand until I have passed by. 23 Then I will remove my hand and you will see my back; but my face must not be seen."

Hannah - 1 Samuel 2:1-10

[1] And Hannah prayed and said,

“My heart exults in the LORD;
my horn is exalted in the LORD.
My mouth derides my enemies,
because I rejoice in your salvation.

[2] “There is none holy like the LORD:
for there is none besides you;
there is no rock like our God.
[3] Talk no more so very proudly,
let not arrogance come from your mouth;
for the LORD is a God of knowledge,
and by him actions are weighed.
[4] The bows of the mighty are broken,
but the feeble bind on strength.
[5] Those who were full have hired themselves out for bread,
but those who were hungry have ceased to hunger.
The barren has borne seven,
but she who has many children is forlorn.
[6] The LORD kills and brings to life;
he brings down to Sheol and raises up.
[7] The LORD makes poor and makes rich;
he brings low and he exalts.
[8] He raises up the poor from the dust;
he lifts the needy from the ash heap
to make them sit with princes
and inherit a seat of honor.
For the pillars of the earth are the LORD's,
and on them he has set the world.

[9] “He will guard the feet of his faithful ones,
but the wicked shall be cut off in darkness,
for not by might shall a man prevail.
[10] The adversaries of the LORD shall be broken to pieces;
against them he will thunder in heaven.
The LORD will judge the ends of the earth;
he will give strength to his king
and exalt the horn of his anointed.”

Hezekiah - 2 Kings 19

14 Hezekiah received the letter from the messengers and read it. Then he went up to the temple of the LORD and spread it out before the LORD. 15 And Hezekiah prayed to the LORD: "O LORD, God of Israel, enthroned between the cherubim, you alone are God over all the kingdoms of the earth. You have made heaven and earth. 16 Give ear, O LORD, and hear; open your eyes, O LORD, and see; listen to the words Sennacherib has sent to insult the living God.

17 "It is true, O LORD, that the Assyrian kings have laid waste these nations and their lands. 18 They have thrown their gods into the fire and destroyed them, for they were not gods but only wood and stone, fashioned by men's hands. 19 Now, O LORD our God, deliver us from his hand, so that all kingdoms on earth may know that you alone, O LORD, are God."

Solomon’s Prayer – 2 Chronicles 6

12 Then Solomon stood before the altar of the LORD in front of the whole assembly of Israel and spread out his hands. 13 Now he had made a bronze platform, five cubits [1] long, five cubits wide and three cubits [2] high, and had placed it in the center of the outer court. He stood on the platform and then knelt down before the whole assembly of Israel and spread out his hands toward heaven. 14 He said:

"O LORD , God of Israel, there is no God like you in heaven or on earth-you who keep your covenant of love with your servants who continue wholeheartedly in your way. 15 You have kept your promise to your servant David my father; with your mouth you have promised and with your hand you have fulfilled it-as it is today. 16 "Now LORD , God of Israel, keep for your servant David my father the promises you made to him when you said, 'You shall never fail to have a man to sit before me on the throne of Israel, if only your sons are careful in all they do to walk before me according to my law, as you have done.' 17 And now, O LORD , God of Israel, let your word that you promised your servant David come true. 18 "But will God really dwell on earth with men? The heavens, even the highest heavens, cannot contain you. How much less this temple I have built! 19 Yet give attention to your servant's prayer and his plea for mercy, O LORD my God. Hear the cry and the prayer that your servant is praying in your presence. 20 May your eyes be open toward this temple day and night, this place of which you said you would put your Name there. May you hear the prayer your servant prays toward this place. 21 Hear the supplications of your servant and of your people Israel when they pray toward this place. Hear from heaven, your dwelling place; and when you hear, forgive. 22 "When a man wrongs his neighbor and is required to take an oath and he comes and swears the oath before your altar in this temple, 23 then hear from heaven and act. Judge between your servants, repaying the guilty by bringing down on his own head what he has done. Declare the innocent not guilty and so establish his innocence. 24 "When your people Israel have been defeated by an enemy because they have sinned against you and when they turn back and confess your name, praying and making supplication before you in this temple, 25 then hear from heaven and forgive the sin of your people Israel and bring them back to the land you gave to them and their fathers. 26 "When the heavens are shut up and there is no rain because your people have sinned against you, and when they pray toward this place and confess your name and turn from their sin because you have afflicted them, 27 then hear from heaven and forgive the sin of your servants, your people Israel. Teach them the right way to live, and send rain on the land you gave your people for an inheritance. 28 "When famine or plague comes to the land, or blight or mildew, locusts or grasshoppers, or when enemies besiege them in any of their cities, whatever disaster or disease may come, 29 and when a prayer or plea is made by any of your people Israel-each one aware of his afflictions and pains, and spreading out his hands toward this temple- 30 then hear from heaven, your dwelling place. Forgive, and deal with each man according to all he does, since you know his heart (for you alone know the hearts of men), 31 so that they will fear you and walk in your ways all the time they live in the land you gave our fathers. 32 "As for the foreigner who does not belong to your people Israel but has come from a distant land because of your great name and your mighty hand and your outstretched arm-when he comes and prays toward this temple, 33 then hear from heaven, your dwelling place, and do whatever the foreigner asks of you, so that all the peoples of the earth may know your name and fear you, as do your own people Israel, and may know that this house I have built bears your Name. 34 "When your people go to war against their enemies, wherever you send them, and when they pray to you toward this city you have chosen and the temple I have built for your Name, 35 then hear from heaven their prayer and their plea, and uphold their cause. 36 "When they sin against you-for there is no one who does not sin-and you become angry with them and give them over to the enemy, who takes them captive to a land far away or near; 37 and if they have a change of heart in the land where they are held captive, and repent and plead with you in the land of their captivity and say, 'We have sinned, we have done wrong and acted wickedly'; 38 and if they turn back to you with all their heart and soul in the land of their captivity where they were taken, and pray toward the land you gave their fathers, toward the city you have chosen and toward the temple I have built for your Name; 39 then from heaven, your dwelling place, hear their prayer and their pleas, and uphold their cause. And forgive your people, who have sinned against you. 40 "Now, my God, may your eyes be open and your ears attentive to the prayers offered in this place.

41 "Now arise, O LORD God, and come to your resting place, you and the ark of your might. May your priests, O LORD God, be clothed with salvation, may your saints rejoice in your goodness. 42 O LORD God, do not reject your anointed one. Remember the great love promised to David your servant."

Asa King of Judah - 2 Chronicles 14:11, 12

11 Then Asa called to the LORD his God and said, "LORD, there is no one like you to help the powerless against the mighty. Help us, O LORD our God, for we rely on you, and in your name we have come against this vast army. O LORD , you are our God; do not let man prevail against you."

Jehoshaphat – 2 Chronicles 20

5 Then Jehoshaphat stood up in the assembly of Judah and Jerusalem at the temple of the LORD in the front of the new courtyard 6 and said:

"O LORD, God of our fathers, are you not the God who is in heaven? You rule over all the kingdoms of the nations. Power and might are in your hand, and no one can withstand you. 7 O our God, did you not drive out the inhabitants of this land before your people Israel and give it forever to the descendants of Abraham your friend? 8 They have lived in it and have built in it a sanctuary for your Name, saying, 9 'If calamity comes upon us, whether the sword of judgment, or plague or famine, we will stand in your presence before this temple that bears your Name and will cry out to you in our distress, and you will hear us and save us.' 10 "But now here are men from Ammon, Moab and Mount Seir, whose territory you would not allow Israel to invade when they came from Egypt; so they turned away from them and did not destroy them. 11 See how they are repaying us by coming to drive us out of the possession you gave us as an inheritance. 12 O our God, will you not judge them? For we have no power to face this vast army that is attacking us. We do not know what to do, but our eyes are upon you."

Jeremiah 14

7 Although our sins testify against us, O LORD, do something for the sake of your name. For our backsliding is great; we have sinned against you. 8 O Hope of Israel, its Savior in times of distress, why are you like a stranger in the land, like a traveler who stays only a night? 9 Why are you like a man taken by surprise, like a warrior powerless to save? You are among us, O LORD, and we bear your name; do not forsake us!

Daniel 9

I prayed to the LORD my God and confessed:

"O Lord, the great and awesome God, who keeps his covenant of love with all who love him and obey his commands, 5 we have sinned and done wrong. We have been wicked and have rebelled; we have turned away from your commands and laws. 6 We have not listened to your servants the prophets, who spoke in your name to our kings, our princes and our fathers, and to all the people of the land. 7 "Lord, you are righteous, but this day we are covered with shame-the men of Judah and people of Jerusalem and all Israel, both near and far, in all the countries where you have scattered us because of our unfaithfulness to you. 8 O LORD , we and our kings, our princes and our fathers are covered with shame because we have sinned against you. 9 The Lord our God is merciful and forgiving, even though we have rebelled against him; 10 we have not obeyed the LORD our God or kept the laws he gave us through his servants the prophets. 11 All Israel has transgressed your law and turned away, refusing to obey you. "Therefore the curses and sworn judgments written in the Law of Moses, the servant of God, have been poured out on us, because we have sinned against you. 12 You have fulfilled the words spoken against us and against our rulers by bringing upon us great disaster. Under the whole heaven nothing has ever been done like what has been done to Jerusalem. 13 Just as it is written in the Law of Moses, all this disaster has come upon us, yet we have not sought the favor of the LORD our God by turning from our sins and giving attention to your truth. 14 The LORD did not hesitate to bring the disaster upon us, for the LORD our God is righteous in everything he does; yet we have not obeyed him. 15 "Now, O Lord our God, who brought your people out of Egypt with a mighty hand and who made for yourself a name that endures to this day, we have sinned, we have done wrong. 16 O Lord, in keeping with all your righteous acts, turn away your anger and your wrath from Jerusalem, your city, your holy hill. Our sins and the iniquities of our fathers have made Jerusalem and your people an object of scorn to all those around us. 17 "Now, our God, hear the prayers and petitions of your servant. For your sake, O Lord, look with favor on your desolate sanctuary. 18 Give ear, O God, and hear; open your eyes and see the desolation of the city that bears your Name. We do not make requests of you because we are righteous, but because of your great mercy. 19 O Lord, listen! O Lord, forgive! O Lord, hear and act! For your sake, O my God, do not delay, because your city and your people bear your Name."

Nehemiah 1

4 When I heard these things, I sat down and wept. For some days I mourned and fasted and prayed before the God of heaven. 5 Then I said:

"O LORD , God of heaven, the great and awesome God, who keeps his covenant of love with those who love him and obey his commands, 6 let your ear be attentive and your eyes open to hear the prayer your servant is praying before you day and night for your servants, the people of Israel. I confess the sins we Israelites, including myself and my father's house, have committed against you. 7 We have acted very wickedly toward you. We have not obeyed the commands, decrees and laws you gave your servant Moses. 8 "Remember the instruction you gave your servant Moses, saying, 'If you are unfaithful, I will scatter you among the nations, 9 but if you return to me and obey my commands, then even if your exiled people are at the farthest horizon, I will gather them from there and bring them to the place I have chosen as a dwelling for my Name.' 10 "They are your servants and your people, whom you redeemed by your great strength and your mighty hand. 11 O Lord, let your ear be attentive to the prayer of this your servant and to the prayer of your servants who delight in revering your name. Give your servant success today by granting him favor in the presence of this man."

Ezra 9

5 Then, at the evening sacrifice, I rose from my self-abasement, with my tunic and cloak torn, and fell on my knees with my hands spread out to the LORD my God 6 and prayed:

"O my God, I am too ashamed and disgraced to lift up my face to you, my God, because our sins are higher than our heads and our guilt has reached to the heavens. 7 From the days of our forefathers until now, our guilt has been great. Because of our sins, we and our kings and our priests have been subjected to the sword and captivity, to pillage and humiliation at the hand of foreign kings, as it is today. 8 "But now, for a brief moment, the LORD our God has been gracious in leaving us a remnant and giving us a firm place in his sanctuary, and so our God gives light to our eyes and a little relief in our bondage. 9 Though we are slaves, our God has not deserted us in our bondage. He has shown us kindness in the sight of the kings of Persia: He has granted us new life to rebuild the house of our God and repair its ruins, and he has given us a wall of protection in Judah and Jerusalem. 10 "But now, O our God, what can we say after this? For we have disregarded the commands 11 you gave through your servants the prophets when you said: 'The land you are entering to possess is a land polluted by the corruption of its peoples. By their detestable practices they have filled it with their impurity from one end to the other. 12 Therefore, do not give your daughters in marriage to their sons or take their daughters for your sons. Do not seek a treaty of friendship with them at any time, that you may be strong and eat the good things of the land and leave it to your children as an everlasting inheritance.' 13 "What has happened to us is a result of our evil deeds and our great guilt, and yet, our God, you have punished us less than our sins have deserved and have given us a remnant like this. 14 Shall we again break your commands and intermarry with the peoples who commit such detestable practices? Would you not be angry enough with us to destroy us, leaving us no remnant or survivor? 15 O LORD , God of Israel, you are righteous! We are left this day as a remnant. Here we are before you in our guilt, though because of it not one of us can stand in your presence."

Habakkuk 3

2 LORD, I have heard of your fame; I stand in awe of your deeds, O LORD. Renew them in our day, in our time make them known; in wrath remember mercy…18 yet I will rejoice in the LORD, I will be joyful in God my Savior. 19 The Sovereign LORD is my strength; he makes my feet like the feet of a deer, he enables me to go on the heights.