2 Thessalonians 2:7

For the secret force of lawlessness is at work already; only, it cannot be revealed till he who at present restrains it is removed.

Revelation 17:5

and on her forehead a name was written by way of symbol, "Babylon the great, the mother of harlots and of all abominations on earth."

Revelation 17:7

But the angel said to me, "Why marvel? I will explain to you the mystery of the woman, and of the Beast with the seven heads and the ten horns who carries her.

1 John 2:18

Children, it is the last hour. You have learned that 'Antichrist is coming.' Well, but many antichrists have appeared ??which makes us sure it is the last hour.

1 John 4:3

and every spirit which does not confess Jesus [incarnate] does not come from God. This latter is the spirit of antichrist; you were told it was coming, and here it is already in the world.

Acts 20:29

I know that when I am gone, fierce wolves will get in among you, and they will not spare the flock; yes.

Colossians 2:18-23

Let no one lay down rules for you as he pleases, with regard to fasting and the cult of angels, presuming on his visions and inflated by his sensuous notions,

1 Timothy 3:16

And who does not admit how profound is the divine truth of our religion? ??it is He who was "manifest in the flesh, vindicated by the Spirit, seen by the angels, preached among the nations, believed on throughout the world, taken up to glory."

2 Timothy 2:17-18

and their doctrine spreads like a gangrene. So it is with Hymenaeus and Philetus;

Treasury of Scripture Knowledge

Summary

For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.

Bible References

The mystery

1 Timothy 3:16
And who does not admit how profound is the divine truth of our religion? ??it is He who was "manifest in the flesh, vindicated by the Spirit, seen by the angels, preached among the nations, believed on throughout the world, taken up to glory."
Revelation 17:5
and on her forehead a name was written by way of symbol, "Babylon the great, the mother of harlots and of all abominations on earth."

Doth

Acts 20:29
I know that when I am gone, fierce wolves will get in among you, and they will not spare the flock; yes.
Colossians 2:18
Let no one lay down rules for you as he pleases, with regard to fasting and the cult of angels, presuming on his visions and inflated by his sensuous notions,
2 Timothy 2:17
and their doctrine spreads like a gangrene. So it is with Hymenaeus and Philetus;
1 John 2:18
Children, it is the last hour. You have learned that 'Antichrist is coming.' Well, but many antichrists have appeared ??which makes us sure it is the last hour.
1 John 4:3
and every spirit which does not confess Jesus [incarnate] does not come from God. This latter is the spirit of antichrist; you were told it was coming, and here it is already in the world.

He who

2 Thessalonians 2:6
Well, you can recall now what it is that restrains him from being revealed before his appointed time.