2 Thessalonians 2:1-3

1Now we beg you, brethren, by the coming of our Lord Jesus Christ and our gathering together to him,

2that ye be not soon shaken in mind, nor troubled, neither by spirit, nor by word, nor by letter, as [if it were] by us, as that the day of the Lord is present.

3Let not any one deceive you in any manner, because [it will not be] unless the apostasy have first come, and the man of sin have been revealed, the son of perdition;