Matthew 14:23
After He had dismissed the crowds, He went up the hill alone to pray. And after the evening came on, He was there alone,
Mark 14:35
Then He walked on a few steps and threw Himself upon the ground and kept praying that if it were possible He might escape the hour of agony,
Luke 6:12
Now it was in those days that He went up on the mountain to pray, and He spent the whole night in prayer to God.
Acts 10:9
The next day, while those men were traveling on and not far from the town, Peter went up on the housetop about noon to pray.
James 5:16-18
So practice confessing your sins to one another, and praying for one another, that you may be cured. An upright man's prayer, when it keeps at work, is very powerful.