Matthew 24:50

the master of that servant will come on a day when he does not expect him and at an hour he is not aware of,

Matthew 24:42-44

Watch therefore, for you do not know on what day your Lord is coming.

1 Thessalonians 5:2-3

For you yourselves know well that the day of the Lord will come like a thief in the night.

Revelation 3:3

Remember therefore what you have received and heard; keep it, and repent. But if you will not wake up, I will come like a thief, and you will not know at what hour I will come upon you.

Treasury of Scripture Knowledge

Summary

The lord of that servant shall come in a day when he looketh not for him, and in an hour that he is not aware of,

Bible References

Come

Matthew 24:42
Watch therefore, for you do not know on what day your Lord is coming.
1 Thessalonians 5:2
For you yourselves know well that the day of the Lord will come like a thief in the night.
Revelation 3:3
Remember therefore what you have received and heard; keep it, and repent. But if you will not wake up, I will come like a thief, and you will not know at what hour I will come upon you.