Matthew 24:39
nor did they realise any danger till the Deluge came and swept them all away; so will it be at the Coming of the Son of Man.
Matthew 24:50
the master of that servant will arrive on a day when he is not expecting him and at an hour of which he has not been informed;
Matthew 25:6
But at midnight there is a loud cry, "'The bridegroom! Go out and meet him!'
1 Thessalonians 5:2
For you yourselves know perfectly well that the day of the Lord comes like a thief in the night.
2 Peter 3:10
The day of the Lord will come like a thief--it will be a day on which the heavens will pass away with a rushing noise, the elements be destroyed in the fierce heat, and the earth and all the works of man be utterly burnt up.