CAB(i)
34 It is like a man going away on a journey, having left his house and having given authority to his servants, and to each his work, and commanded the doorkeeper that he should watch.
35 Watch therefore, for you do not know when the master of the house is coming--at evening, or at midnight, or at dawn, or early in the morning--
36 lest having come suddenly, he should find you sleeping.