Luke 6:12
One of those days Jesus went out to a mountainside to pray, and spent the night praying to God — the night of prayer before the appointment of the twelve is unique to Luke — no other Gospel records the overnight prayer. Spent the night praying to God communicates the weight of what Jesus is about to do: the appointment of the twelve is not a managerial decision but a prayerful act of discernment. The mountain and the overnight prayer position the appointment within the pattern of divine encounter.