Cross reference
Mark 14:39
39 And again he went away, and prayed, saying the same words.
Matthew 6:7
7 And in praying use not vain repetitions, as the Gentiles do: for they think that they shall be heard for their much speaking.
Matthew 26:42-44
42 Again a second time he went away, and prayed, saying, My Father, if this cannot pass away, except I drink it, thy will be done.
43 And he came again and found them sleeping, for their eyes were heavy.
44 And he left them again, and went away, and prayed a third time, saying again the same words.
Luke 18:1
1 And he spake a parable unto them to the end that they ought always to pray, and not to faint;
2 Corinthians 12:8
8 Concerning this thing I besought the Lord thrice, that it might depart from me.