2 Thessalonians 2:4-8

who opposes and exalts himself above every so-called god or object of worship, so that he takes his seat in the temple of God, displaying himself as being God.

Do you not remember that while I was still with you, I was telling you these things?

And you know what restrains him now, so that he will be revealed in his time.

For the mystery of lawlessness is already at work; only He who now restrains will do so until He is removed.

Then that lawless one will be revealed, whom the Lord will eliminate with the breath of His mouth and bring to an end by the appearance of His coming;