Matthew 24:39
and they knew not until the flood came, and took them all away; so will be the coming of the Son of Man.
Matthew 24:50
the lord of that servant will come in a day when he is not expecting him, and in an hour when he knows not,
Matthew 25:6
but at midnight a cry has been made, 'Behold, the bridegroom! Come ye forth to meet him!'
1 Thessalonians 5:2
for ye yourselves know accurately that the day of the Lord so comes as a thief at night.
2 Peter 3:10
But the day of the Lord will come as a thief, in which the heavens will pass away with a rushing noise, and the elements, being intensely hot, shall be dissolved, and the earth and the works therein shall be burned up.