Matthew 14:23
And when he had sent away the multitude, he went up into a mountain apart to pray: and when evening came, he was there alone.
Mark 14:35
And he went a little farther forward, and fell on the earth, and prayed, that if it were possible the hour might pass from him.
Luke 6:12
Now it came to pass in those days, that he went out into a mountain to pray and continued all night in an oratory of God.
Acts 10:9
Then the next morning, as they were on their journey, and drew near to the city, Peter went up to the flat roof to pray about the sixth hour:
James 5:16-18
Confess your offences one to another, and pray for one another, that ye may be healed. The energetic prayer of a righteous man is mightily prevalent.