Matthew 26:44
And having left them, having gone away again, he prayed a third time, saying the same word;
2 Corinthians 12:8
Concerning this thing thrice the Lord did I call upon, that it might depart from me,
Daniel 9:17-19
and now, hearken, O our God, unto the prayer of Thy servant, and unto his supplication, and cause Thy face to shine on Thy sanctuary that is desolate, for the Lord's sake.
Matthew 6:7
And -- praying -- ye may not use vain repetitions like the nations, for they think that in their much speaking they shall be heard,
Luke 18:1
And he spake also a simile to them, that it behoveth us always to pray, and not to faint,