1 Thessalonians 5:1-4

You do not need me to write you concerning dates and times, for you know perfectly well that the day of the Lord will come like a thief in the night. While people are saying, "Peace and safety," destruction will come on them suddenly, as labor pains on a woman with child, and they will not escape. But you, brothers, are not in darkness. Therefore, that day will not surprise you like a thief.