1 Thessalonians 5:4-6

Revised Standard Version Catholic Edition

⁴ But you are not in darkness, brethren, for that day to surprise you like a thief. ⁵ For you are all sons of light and sons of the day; we are not of the night or of darkness. ⁶ So then let us not sleep, as others do, but let us keep awake and be sober.