In the book of Mark, chapter 13 verses 32-37  32 “As to the exact day or hour, no one knows it, neither the angels in heaven nor even the Son, but only the Father. 33 Be constantly on the watch!   Stay awake!   You do not know when the appointed time will come 34  It is like a man traveling abroad.   He leaves home and  places his servants in charge, each with his own task; and he orders the man at the gate to watch with a sharp eye.   35 Look around you!   You do not know when the master of the house is coming, whether dawn or dusk, at midnight, when the cock crows, or at the early dawn.   36 Do not let him come suddenly and catch you asleep.   37 What I say to you, I say to all; Be on guard!”