1 John 4:3

Modern King James Version

and every spirit that does not confess that Jesus Christ has come in the flesh is not of God. And this is the antichrist you heard is coming, and even now is already in the world.

Cross References

Matthew 24:5

For many will come in My name, saying, I am Christ, and will deceive many.

1 John 2:18

Little children, it is the last time. And just as you have heard that antichrist is coming, even now many antichrists have risen up, from which we know that it is the last hour.

1 John 2:22

Who is a liar but he who denies that Jesus is the Christ? He who denies the Father and the Son is antichrist.

2 John 1:7

For many deceivers have entered into the world, who do not confess Jesus Christ coming in the flesh. This is the deceiver and the anti-christ.