1 Thessalonians 5:2
For ye yourselves know perfectly, 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 in the night, in which the heavens shall pass away with a great noise, the elements shall melt with fervent heat, and the earth, and the works that are therein, shall be burnt up.
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.
Revelation 16:15
(Behold I come as a thief. Happy is he that watcheth and keepeth his garments, lest he walk naked and they see his shame.)
Matthew 24:42-44
Watch therefore; for ye know not what hour your Lord cometh.
Matthew 25:13
Watch therefore; for ye know not the day nor the hour.
Mark 13:34-35
For the Son of man is as a man taking a far journey, who left his house, and gave authority to his servants, and to each his work, and commanded the porter to watch.
Luke 12:39-40
And this ye know, that if the master of the house had known, what hour the thief would have come, he would have watched, and not have suffered his house to be broke open.
1 Corinthians 1:8
waiting for the revelation of our Lord Jesus Christ, Who will also confirm you to the end, that ye may be blameless in the day of the Lord Jesus Christ.