Mark 13:33-37

This is why you must be waiting, watching and praying, because no one knows when that season of time will come.” “For those days can be compared to a man who was about to leave on a journey, but before leaving he placed his servants in charge and gave each one work to do while he was away. Then he commanded the watchman to be on guard at all times. So I say to you, keep awake and alert—for you have no idea when the master of the house will return; in the evening, at midnight, at four o’clock in the morning, or at dawn. Be alert, for he’s coming suddenly and may find you sleeping! And what I say to the four of you, I say to everyone—be awake at all times!”