Luke 21:34 "Be on guard, so that your hearts will not be weighted down with dissipation and drunkenness and the worries of life, and that day will not come on you suddenly like a trap;

1 Corinthians 1:8 who will also confirm you to the end, blameless in the day of our Lord Jesus Christ.

1 Thessalonians 5:4 But you, brethren, are not in darkness, that the day would overtake you like a thief;

2 Peter 3:10 But the day of the Lord will come like a thief, in which the heavens will pass away with a roar and the elements will be destroyed with intense heat, and the earth and its works will be burned up.

Revelation 3:3 So remember what you have received and heard; and keep it, and repent. Therefore if you do not wake up, I will come like a thief, and you will not know at what hour I will come to you.

Revelation 16:15 ("Behold, I am coming like a thief. Blessed is the one who stays awake and keeps his clothes, so that he will not walk about naked and men will not see his shame.") (NASB ©1995)