2 Thessalonians 2:1-3

Now we ask you, brothers and sisters, regarding the coming of our Lord Jesus Christ and our gathering together to Him,

that you not be quickly shaken from your composure or be disturbed either by a spirit, or a message, or a letter as if from us, to the effect that the day of the Lord has come.

No one is to deceive you in any way! For it will not come unless the apostasy comes first, and the man of lawlessness is revealed, the son of destruction,