But you, brethren, are not in darkness, so that this Day should overtake you as a thief.
1 Thessalonians 5:4
Surrounding context
5:3 For when they say, "Peace and safety!" then sudden destruction comes upon them, as labor pains upon a pregnant woman. And they shall not escape.
5:4 But you, brethren, are not in darkness, so that this Day should overtake you as a thief.
5:5 You are all sons of light and sons of the day. We are not of the night nor of darkness.