Exodus 9:33
Then Moses departed from Pharaoh, went out of the city, and spread out his hands to the LORD. The thunder and hail ceased, and the rain no longer poured down on the land.

Exodus 10:18
So Moses left Pharaoh’s presence and appealed to the LORD.

Exodus 32:11-14
But Moses sought the favor of the LORD his God, saying, “O LORD, why does Your anger burn against Your people, whom You brought out of the land of Egypt with great power and a mighty hand? / Why should the Egyptians declare, ‘He brought them out with evil intent, to kill them in the mountains and wipe them from the face of the earth’? Turn from Your fierce anger and relent from doing harm to Your people. / Remember Your servants Abraham, Isaac, and Israel, to whom You swore by Your very self when You declared, ‘I will make your descendants as numerous as the stars in the sky, and I will give your descendants all this land that I have promised, and it shall be their inheritance forever.’” ...

Numbers 11:2
And the people cried out to Moses, and he prayed to the LORD, and the fire died down.

Numbers 21:7
Then the people came to Moses and said, “We have sinned by speaking against the LORD and against you. Intercede with the LORD so He will take the snakes away from us.” So Moses interceded for the people.

Deuteronomy 9:18-20
Then I fell down before the LORD for forty days and forty nights, as I had done the first time. I did not eat bread or drink water because of all the sin you had committed in doing what was evil in the sight of the LORD and provoking Him to anger. / For I was afraid of the anger and wrath that the LORD had directed against you, enough to destroy you. But the LORD listened to me this time as well. / The LORD was angry enough with Aaron to destroy him, but at that time I also prayed for Aaron.

1 Samuel 7:9
Then Samuel took a suckling lamb and offered it as a whole burnt offering to the LORD. He cried out to the LORD on behalf of Israel, and the LORD answered him.

1 Kings 13:6
Then the king responded to the man of God, “Intercede with the LORD your God and pray for me that my hand may be restored.” So the man of God interceded with the LORD, and the king’s hand was restored to him as it was before.

2 Kings 19:15-20
And Hezekiah prayed before the LORD: “O LORD, God of Israel, enthroned between the cherubim, You alone are God over all the kingdoms of the earth. You made the heavens and the earth. / Incline Your ear, O LORD, and hear; open Your eyes, O LORD, and see. Listen to the words that Sennacherib has sent to defy the living God. / Truly, O LORD, the kings of Assyria have laid waste these nations and their lands. ...

2 Chronicles 32:20-21
In response, King Hezekiah and the prophet Isaiah son of Amoz cried out to heaven in prayer, / and the LORD sent an angel who annihilated every mighty man of valor and every leader and commander in the camp of the king of Assyria. So he withdrew to his own land in disgrace. And when he entered the temple of his god, some of his own sons struck him down with the sword.

Psalm 99:6
Moses and Aaron were among His priests; Samuel was among those who called on His name. They called to the LORD and He answered.

Jeremiah 15:1
Then the LORD said to me: “Even if Moses and Samuel should stand before Me, My heart would not go out to this people. Send them from My presence, and let them go!

Matthew 17:21
But this kind does not go out except by prayer and fasting.”

Mark 9:29
Jesus answered, “This kind cannot come out, except by prayer.”

Luke 11:1
One day in a place where Jesus had just finished praying, one of His disciples requested, “Lord, teach us to pray, just as John taught his disciples.”