WPNT(i)
33 Watch! Keep alert! Pray! Because you do not know when that time will be.
34 It is like a man off on a journey, having left his house and given the authority to his slaves, and to each his work; and he commanded the doorkeeper to keep watch.
35 Therefore be watchful, because you do not know when the master of the house is coming—at evening or at midnight or at cockcrow or early morning—
36 lest coming suddenly he find you sleeping.