Matthew 26:44

And leaving them, he went away again, and prayed the third time, saying again the same words.

2 Corinthians 12:8

In respect to this I besought the Lord thrice, that it might depart from me;

Matthew 6:7

But when ye pray, use not vain repetitions, as the heathen do; for they think that they shall be heard for the multitude of their words.

Luke 18:1

And he spoke a parable to them to show that they ought to pray always, and not be fainthearted:

Treasury of Scripture Knowledge

Summary

And he left them, and went away again, and prayed the third time, saying the same words.

Bible References

Prayed

Matthew 6:7
But when ye pray, use not vain repetitions, as the heathen do; for they think that they shall be heard for the multitude of their words.
Luke 18:1
And he spoke a parable to them to show that they ought to pray always, and not be fainthearted:
2 Corinthians 12:8
In respect to this I besought the Lord thrice, that it might depart from me;