2 Thessalonians 2:2-4

Amplified Bible

² not to be quickly unsettled or alarmed either by a [so-called prophetic revelation of a] spirit or a message or a letter [alleged to be] from us, to the effect that the day of the Lord has [already] come. ³ Let no one in any way deceive or entrap you, for that day will not come unless the ^[a]apostasy comes first [that is, the great rebellion, the abandonment of the faith by professed Christians], and the man of lawlessness is revealed, the son of destruction [the Antichrist, the one who is destined to be destroyed],^{(A) 4} who opposes and exalts himself [so proudly and so insolently] above ^[b]every so-called god or object of worship, so that he [actually enters and] takes his seat in the temple of God, publicly proclaiming that he himself is God.^(B)