Matthew 24:50

The Lord of that servant shall come in a day that he expecteth him not, and in an hour that he is not aware of,

Matthew 24:42-44

Watch therefore; for ye know not what hour your Lord cometh.

1 Thessalonians 5:2-3

For ye yourselves know perfectly, that the day of the Lord so cometh as a thief in the night.

Revelation 3:3

Remember therefore how thou hast received and heard, and hold fast and repent. If thou watch not, I will come as a thief, and thou shalt not know at what hour I will come upon thee.

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 ye know not what hour your Lord cometh.
1 Thessalonians 5:2
For ye yourselves know perfectly, that the day of the Lord so cometh as a thief in the night.
Revelation 3:3
Remember therefore how thou hast received and heard, and hold fast and repent. If thou watch not, I will come as a thief, and thou shalt not know at what hour I will come upon thee.