Matthew 24:39
and knew not till the flood came and took them all away, so shall the coming of the Son of man be.
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 25:6
but at midnight there was a cry, Behold the bridegroom; go out to meet him.
1 Thessalonians 5:2
for you yourselves know perfectly that the day of the Lord comes like a thief in the night.
2 Peter 3:10
But the day of the Lord will come as a thief, in which the heavens shall pass away with a crash, and the elements be melted with heat, and the earth and the works in it be consumed.