'Anti christ' in the Bible

Little children, it is the last time: and as ye have heard that Antichrist cometh, so even now there are many Antichrists, whereby we know that it is the last time.

Who is that liar, but he that denieth that Jesus is the Christ? He is Antichrist who denieth the Father and the Son.

And every spirit which confesseth not Jesus Christ come in the flesh, is not of God: and this is that spirit of Antichrist, whereof ye have heard that it should come; and now already it is in the world.