50 the master of that servant will come in a day in which he looks not for him, and at an hour which he knows not,
Matthew 24:50 Cross References - Anderson
Matthew 24:42-44
42 "Watch, therefore, for you know not at what hour your Lord is coming.
43 But know this, That if the master of the house had known at what watch the thief comes, he would have watched, and would not have permitted his house to be broken open.
44 For this reason, be you also ready; for at an hour in which you think not, the Son of man comes.
1 Thessalonians 5:2-3
Revelation 3:3
3 Remember, therefore, how you have received and heard, and be watchful and repent. If, therefore, you do not watch, I will come upon you as a thief, and you shall not know at what hour I will come upon you.