1 John 4:3

Young's Literal Translation 1862

and every spirit that doth not confess Jesus Christ in the flesh having come, of God it is not; and this is that of the antichrist, which ye heard that it doth come, and now in the world it is already.

Cross References

Matthew 24:5

for many shall come in my name, saying, I am the Christ, and they shall lead many astray,

1 John 2:18

Little youths, it is the last hour; and even as ye heard that the antichrist doth come, even now antichrists have become many -- whence we know that it is the last hour;

1 John 2:22

Who is the liar, except he who is denying that Jesus is the Christ? this one is the antichrist who is denying the Father and the Son;

2 John 1:7

because many leading astray did enter into the world, who are not confessing Jesus Christ coming in flesh; this one is he who is leading astray, and the antichrist.