Matthew 26:44
And he left them, and went away again, and prayed the third time, saying the same words.
Cross-references
Luke 18:1
Parallel
Luke 18:1 teaches to always pray and not lose heart; Jesus exemplifies this by praying three times.
Luke 22:42
Parallel
Luke 22:42 records Jesus' actual prayer words—'remove this cup'—which he repeats three times in Matthew.
2 Corinthians 12:8
Parallel
In 2 Corinthians 12:8, Paul also pleads three times for relief, echoing Jesus' threefold prayer.