Luke 12:39 in the King James Version
And this know, that if the goodman of the house had known what hour the thief would come, he would have watched, and not have suffered his house to be broken through.
Context
38 They will be blessed if he comes in the second or third watch and finds them so.
39 But know this, that if the master of the house had known in what hour the thief was coming, he would have watched and not allowed his house to be broken into.
40 Therefore be ready also, for the Son of Man is coming in an hour that you don’t expect him.”