Matthew 24:39
and knew nothing about it until the flood came and destroyed them all, so it will be at the coming of the Son of Man.
Matthew 24:50
that slave's master will come back some day when he does not expect him, and at some time of which he does not know
Matthew 25:6
But in the middle of the night there was a shout 'Here is the bridegroom! Come out and meet him!'
1 Thessalonians 5:2
for you yourselves know perfectly well that the Day of the Lord is to come like a thief in the night.
2 Peter 3:10
The Day of the Lord will come like a thief; on it the heavens will pass away with a roar, the heavenly bodies will burn up and be destroyed, and the earth and all its works will melt away.