By this you know the Spirit of God: every spirit that confesses that Jesus Christ came in the flesh, is from God:

and whatever spirit confesses not that Jesus Christ came in the flesh, is not from God: and this is the spirit of antichrist, of which you have heard that it comes, and is now already in the world.

This is he that came by water and by blood, Jesus the Christ; not by water only, but by water and by blood: and it is the Spirit that testifies, because the Spirit is truth.