Mark 13:29-37

29 In the same way, when you see these things happen, you know that he is near, at the door.
30 "I can guarantee this truth: This generation will not disappear until all these things take place.
31 The earth and the heavens will disappear, but my words will never disappear.
32 "No one knows when that day or hour will come. Even the angels in heaven and the Son don't know. Only the Father knows.
33 Be careful! Watch! You don't know the exact time.
34 It is like a man who went on a trip. As he left home, he put his servants in charge. He assigned work to each one and ordered the guard to be alert.
35 Therefore, be alert, because you don't know when the owner of the house will return. It could be in the evening or at midnight or at dawn or in the morning.
36 Make sure he doesn't come suddenly and find you asleep.
37 I'm telling everyone what I'm telling you: 'Be alert!'"