Mark 13:33-36
13:33 Watch out! Stay alert! For you do not know when the time will come.
13:34 It is like a man going on a journey. He left his house and put his slaves in charge, assigning to each his work, and commanded the doorkeeper to stay alert.
13:35 Stay alert, then, because you do not know when the owner of the house will return – whether during evening, at midnight, when the rooster crows, or at dawn –
13:36 or else he might find you asleep when he returns suddenly.