1 John 4:3

and every spirit that does not own that Jesus Christ is come in the flesh, is not from God." this is that anti-christian spirit which you have heard was to come, and even now it appears in the world.

1 John 2:18

Dear children, the last time is come: as ye have heard that antichrist was to come, accordingly many antichrists have already appeared; whereby we know that we are now in the last times.

1 John 2:22

who is so great an impostor as he, who denies that Jesus is the Christ? he is antichrist, that denies the father and the son.

2 John 1:7

For there are many impostors started up in the world, who will not own that Jesus Christ was incarnate. such a one is an impostor and an anti-christ.

2 Thessalonians 2:3-8

don't be led into any mistake, because the previous rebellion does not yet appear, nor the man of sin throw off the disguise, that offspring of perdition:

Treasury of Scripture Knowledge

Summary

1 John 4:3

And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.

And this

1 John 2:18

2 Thessalonians 2:7

2 John 1:7

General references

John 8:47

Bible References

And this

Dear children, the last time is come: as ye have heard that antichrist was to come, accordingly many antichrists have already appeared; whereby we know that we are now in the last times.

for the secret spirit of misrule is ready to break out as soon as the obstacle is taken away:

For there are many impostors started up in the world, who will not own that Jesus Christ was incarnate. such a one is an impostor and an anti-christ.

General references

he that is of God, does therefore observe what God says: which you do not observe, because ye are not of God.