Luke 18:7
And shall not God vindicate his own elect, who cry to him day and night, though he bear long with them?
Matthew 26:44
And leaving them, he went away again, and prayed the third time, saying the same words.
Luke 6:12
And in those days he went out into a mountain to pray, and continued all night in the prayer of God.
Luke 22:41-46
And he was withdrawn from them about a stone's cast,
1 Thessalonians 3:10
Night and day praying exceedingly, that we may see your face, and perfect that which is wanting in your faith.
2 Timothy 1:3
I thank God, whom I serve from my forefathers with a pure conscience, that I have remembrance of thee in my prayers without ceasing night and day,