1 John 4:1-3

Wycliffe Bible

4 Most dear brethren, do not ye believe to each spirit, but prove ye the spirits, if they be of God; for many false prophets went out into the world.

² In this thing the Spirit of God is known; each spirit that acknowledgeth that Jesus Christ hath come in flesh, is of God;

³ and each spirit that undoeth Jesus, is not of God. And this is antichrist, of whom ye have heard, that he cometh; and right now he is in the world.