2 Thessalonians 2:2-3

2not to become easily unsettled or alarmed by the teaching allegedly from us—whether by a prophecy or by word of mouth or by letter—asserting that the day of the Lord has already come. 3Don’t let anyone deceive you in any way, for that day will not come until the rebellion occurs and the man of lawlessness Some manuscripts sin is revealed, the man doomed to destruction.