Matthew 26:44
And he left them again, and went away, and prayed a third time, saying again the same words.
2 Corinthians 12:8
Concerning this thing I besought the Lord thrice, that it might depart from me.
Daniel 9:17-19
Now therefore, O our God, hearken unto the prayer of thy servant, and to his supplications, and cause thy face to shine upon thy sanctuary that is desolate, for the Lord's sake.
Matthew 6:7
And in praying use not vain repetitions, as the Gentiles do: for they think that they shall be heard for their much speaking.
Luke 18:1
And he spake a parable unto them to the end that they ought always to pray, and not to faint;