1 John 4:3

And every spirit that does not confess Jesus, is not from God: and this is that spirit of antichrist, which you have heard that it comes, and now is in the world already.

1 John 2:18

Young children, it is the last period. And as you have heard that the antichrist comes, so, now, there are many antichrists; whence you know that it is the last period.

1 John 2:22

Who is a liar, if not he who denies that Jesus is the Christ? He is the antichrist who denies the Father and the Son.

2 John 1:7

for many deceivers are entered into the world, who do not confess Jesus Christ did come in the flesh. This is the deceiver, and the antichrist.

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 John 1:7

Bible References

And this

Young children, it is the last period. And as you have heard that the antichrist comes, so, now, there are many antichrists; whence you know that it is the last period.

for many deceivers are entered into the world, who do not confess Jesus Christ did come in the flesh. This is the deceiver, and the antichrist.