2 Thessalonians 2:1-3

And we beseech you, brethren, by the coming of our Lord Jesus Christ and of our gathering together unto him:

That you be not easily moved from your sense nor be terrified, neither by spirit nor by word nor by epistle. as sent from us, as if the day of the Lord were at hand.

Let no man deceive you by any means: for unless there come a revolt first, and the man of sin be revealed, the son of perdition