Luke 18:7
"And will not God see justice done to his elect who are crying unto him day and night, even if he seems to delay helping them?
Matthew 26:44
So he left them and went away again, and prayed the third time in the same words as before.
Luke 6:12
It happened about that time that he went out into the mountain to pray. He continued all night in prayer to God.
Luke 22:41-46
But he himself withdrew from them about a stone's throw, kneeling down he prayed repeatedly, saying.
1 Thessalonians 3:10
Night and day I am praying earnestly that I may see you face to face, and may perfect whatever is yet lacking in your faith.
2 Timothy 1:3
I give thanks to God whom I worship with a pure conscience as my fathers did, when I remember you unceasingly in my prayers.