'Anti christ' in the Bible

Little children, it is the last time; and as you heard that antichrist is coming, even now many have become anti-christs; whence we know that it is the last time.

Who is a liar but he that denies that Jesus is the Christ? This is the anti-christ, [the man that] denies the Father and the Son.

and every spirit which does not confess Jesus is not of God. And this is the [spirit] of anti-christ, of which you have heard that he is coming, and he is now in the world already.