1 Thessalonians 5:2-6

For you know quite well that the day of the Lord’s return will come unexpectedly, like a thief in the night. When people are saying, “Everything is peaceful and secure,” then disaster will fall on them as suddenly as a pregnant woman’s labor pains begin. And there will be no escape. But you aren’t in the dark about these things, dear brothers and sisters, and you won’t be surprised when the day of the Lord comes like a thief. For you are all children of the light and of the day; we don’t belong to darkness and night. So be on your guard, not asleep like the others. Stay alert and be clearheaded.