1 Thessalonians 5:2
for yourselves know precisely that the day of the Lord so cometh as a thief in the night.
2 Peter 3:10
But the day of the Lord will come as a thief by night; in which the heavens shall pass away with a rushing noise, and the first principles of matter in flames dissolve, and the earth and all the works upon it be burnt up.
Revelation 3:3
Remember therefore how thou hast received and heard, and observe, and repent. If then thou art not found watching, I will come upon thee as a thief, and thou shalt in no wise know at what hour I will come upon thee.
Revelation 16:15
Behold, I come as a thief. Blessed is he who watcheth, and keepeth his garments, that he walk not about naked, and men see his shame.
Matthew 24:42-44
Watch therefore: for ye know not at what hour your Master cometh.
Matthew 25:13
Watch therefore, for ye know not the day nor the hour in which the Son of man cometh.
Mark 13:34-35
As a man going abroad, when he left his abode, and gave his servants authority, and to each his work, commanded also the porter to watch.
Luke 12:39-40
Now this be assured of, that if the master of the family had known at what hour the thief would come, he would have watched, and would not have suffered his house to be broken through.
1 Corinthians 1:8
who shall confirm you to the end blameless in the day of our Lord Jesus Christ.