1 Thessalonians 5:2-6 KJV
For yourselves know perfectly that the day of the Lord so cometh as a thief in the night. [3] For when they shall say, Peace and safety; then sudden destruction cometh upon them, as travail upon a woman with child; and they shall not escape. [4] But ye, brethren, are not in darkness, that that day should overtake you as a thief. [5] Ye are all the children of light, and the children of the day: we are not of the night, nor of darkness. [6] Therefore let us not sleep, as do others; but let us watch and be sober.