Luke 6:12
And it came to pass in those days, that he went out into the mountain to pray; and he spent the night in prayer to God.
Mark 1:35
And very early in the morning, while it was yet dark, he arose and went out, and departed to a desert place, and there prayed.
Matthew 6:6
But do you, when you pray, go into your closet, and when you have closed the door, pray to your Father who is in secret: and your Father who sees in secret will reward you openly.
Matthew 14:23-25
And when he had sent the multitudes away, he went up into the mountain apart to pray. And when evening came, he was there alone.
Mark 6:46
And when he had sent them away, he went into the mountain to pray.
Mark 14:34-36
And he said to them: My soul is encompassed with sorrow, even to death; remain here, and watch.
Colossians 4:2
Persevere in prayer, and be watchful in the same with thanksgiving;
Hebrews 5:7
In the days of his flesh, having offered up prayers and supplications, with strong crying and tears, to him that was able to save him from death, and having been heard with respect to that which he feared,