2 Thessalonians 2:3-5

Do not let anyone fool you in any way. That day of the Lord will not come until the turning away from God happens and the Man of Evil, who is on his way to hell, appears. He will be against and put himself above any so-called god or anything that people worship. And that Man of Evil will even go into God’s Temple and sit there and say that he is God. I told you when I was with you that all this would happen. Do you not remember?