Matthew 26:44
After leaving them again, he went away and prayed again for the third time, saying the same thing.
2 Corinthians 12:8
I pleaded with the Lord three times to take it away from me,
Daniel 9:17-19
"So now, O God, listen to the prayer of your servant and to his requests, and look with favor on your desolate sanctuary, for the sake of the Lord.
Matthew 6:7
"When you are praying, don't say meaningless things like the unbelievers do, because they think they will be heard by being so wordy.
Luke 18:1
Jesus told his disciples a parable about their need to pray all the time and never give up.