The Gospel According to St Matthew 24 42-47
42 Watch therefore, for you do not know on what day your Lord is coming. 43 But know this, that if the householder had known in what part of the night the thief was coming, he would have watched and would not have let his house be broken into. 44 Therefore you also must be ready; for the Son of man is coming at an hour you do not expect.
The Faithful or the Unfaithful Slave