Mark 14:39

Again he went away and prayed, and spoke the same words.

Matthew 6:7

Large quantities of meaningless words and repetition are not acceptable in prayer. The pagans think their gods will hear long and repetitious prayers.

Matthew 26:42-44

A second time he went away and prayed, saying: Father, if this cannot pass away, except I drink it, your will be done.

Luke 18:1

He spoke an illustration to them emphasizing the need to pray and not become tired:

2 Corinthians 12:8

Three times I prayed to God about this and asked him to take it away.

Treasury of Scripture Knowledge

Summary

And again he went away, and prayed, and spake the same words.

Bible References

He went

Matthew 6:7
Large quantities of meaningless words and repetition are not acceptable in prayer. The pagans think their gods will hear long and repetitious prayers.
Matthew 26:42
A second time he went away and prayed, saying: Father, if this cannot pass away, except I drink it, your will be done.
Luke 18:1
He spoke an illustration to them emphasizing the need to pray and not become tired:
2 Corinthians 12:8
Three times I prayed to God about this and asked him to take it away.