Matthew 24:50

the Lord of that servant will come on a day when he looks not for him, and at an hour that he knows not of,

Matthew 24:42-44

Watch, therefore, for you know not on what day your Lord comes,

1 Thessalonians 5:2-3

for you yourselves know perfectly that the day of the Lord comes like a thief in the night.

Revelation 3:3

Remember therefore how you have received and heard, and watch, and change your minds. If therefore you do not watch, I will come as a thief, and you shall 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 know not on what day your Lord comes,
1 Thessalonians 5:2
for you yourselves know perfectly that the day of the Lord comes like a thief in the night.
Revelation 3:3
Remember therefore how you have received and heard, and watch, and change your minds. If therefore you do not watch, I will come as a thief, and you shall not know at what hour I will come upon you.