1 Thessalonians 5:1-3

Now as to the times and dates, brothers and sisters, you have no need for anything to be written to you. For you yourselves know perfectly well that the day of the [return of the] Lord is coming just as a thief [comes unexpectedly and suddenly] in the night. While they are saying, “Peace and safety [all is well and secure!]” then [in a moment unforeseen] destruction will come upon them suddenly like labor pains on a woman with child, and they will absolutely not escape [for there will be no way to escape the judgment of the Lord].