Mark 13:33-37

33 'Be on your guard, stay awake, because you never know when the time will come.

34 It is like a man travelling abroad: he has gone from his home, and left his servants in charge, each with his own work to do; and he has told the doorkeeper to stay awake.

35 So stay awake, because you do not know when the master of the house is coming, evening, midnight, cockcrow or dawn;

36 if he comes unexpectedly, he must not find you asleep.

37 And what I am saying to you I say to all: Stay awake!'