Mark 13:34-37

It is like a man going to a far country, who left his house and gave authority to his servants, and to each his work, and commanded the doorkeeper to watch. Watch therefore, for you do not know when the master of the house is coming—in the evening, at midnight, at the crowing of the rooster, or in the morning— lest, coming suddenly, he find you sleeping. And what I say to you, I say to all: Watch!”