2 Thessalonians 2:7

For the secret power of lawlessness is already at work, but only until he who is holding it back has been gotten out of the way.

Revelation 17:5

On her forehead was written a name with a symbolical meaning, "Mighty Babylon, the mother of prostitutes and of earth's abominations."

Revelation 17:7

but the angel said to me: "Why are you astonished? I will tell you the symbolical meaning of the woman, and the wild beast with seven heads and ten horns, that carries her.

1 John 2:18

Little children, it is the last hour, just as you have heard that Antichrist is Coming, and already many Antichrists have appeared; so we may be sure that it is the last hour.

1 John 4:3

and no spiritual utterance which disowns Jesus can come from God; it is the utterance of Antichrist. You have heard that it is coming, and right now it is already in the world.

Acts 20:29

Because I know that after I have gone violent wolves will break in among you and will not spare the flock.

Colossians 2:18-23

Stop letting anyone, in gratuitous humility and worship of angels, defraud you as an umpire, for such a one is taking his stand on the mere visions he has seen, and is groundlessly conceited over his sensuous mind.

1 Timothy 3:16

Undoubtedly the mystery of our religion is a great wonder: "He was made visible in human form; He was vindicated by the Spirit; He was seen by angels; He was proclaimed among the heathen; He was trusted in throughout the world; He was taken up to glory."

2 Timothy 2:17-18

and their message will spread like a cancer; men like 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
Undoubtedly the mystery of our religion is a great wonder: "He was made visible in human form; He was vindicated by the Spirit; He was seen by angels; He was proclaimed among the heathen; He was trusted in throughout the world; He was taken up to glory."
Revelation 17:5
On her forehead was written a name with a symbolical meaning, "Mighty Babylon, the mother of prostitutes and of earth's abominations."

Doth

Acts 20:29
Because I know that after I have gone violent wolves will break in among you and will not spare the flock.
Colossians 2:18
Stop letting anyone, in gratuitous humility and worship of angels, defraud you as an umpire, for such a one is taking his stand on the mere visions he has seen, and is groundlessly conceited over his sensuous mind.
2 Timothy 2:17
and their message will spread like a cancer; men like Hymenaeus and Philetus,
1 John 2:18
Little children, it is the last hour, just as you have heard that Antichrist is Coming, and already many Antichrists have appeared; so we may be sure that it is the last hour.
1 John 4:3
and no spiritual utterance which disowns Jesus can come from God; it is the utterance of Antichrist. You have heard that it is coming, and right now it is already in the world.

He who

2 Thessalonians 2:6
So now you know the power that is holding him back, that he is to be unveiled at His own appointed time.