Matthew 24:39
and as they knew nothing till the deluge came and swept them all away; so will the arrival of the Son of man be.
Matthew 24:50
that servant's lord and master will arrive on a day when he does not expect him and at an hour which he does not know;
Matthew 25:6
But at midnight the cry arose, 'Here is the bridegroom! Come out to meet him!'
1 Thessalonians 5:2
You 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, when the heavens will vanish with crackling roar, the stars will be set ablaze and melt, the earth and all its works will disappear.