Matthew 24:39
nor did they know until the deluge came and swept them away; so will be the coming of the son of man.
Matthew 24:50
on a day when he is not expecting him, and at an hour which he does not know, the Master of that servant will arrive
Matthew 25:6
But at midnight there arose a cry, "'Behold, the bridegroom! Go out to meet him!'
1 Thessalonians 5:2
You yourselves know perfectly that the Day of the Lord will come as a thief in the night.
2 Peter 3:10
But the Day of the Lord will come like a thief; and on that Day the heavens will vanish with a crash, the heavenly bodies will melt with fervent heat, and the earth and all its works will be burned up.