And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God.
All Commentaries on Luke 6:12 Go To Luke 6
Cyprian of Carthage
AD 258
For the apostles also ceased not to pray day and night; and the Lord also Himself, the teacher of our discipline, and the way of our example, frequently and watch-fully prayed, as we read in the Gospel: "He went out into a mountain to pray, and continued all night in prayer to God."