1Jn 1 John, chapter First Epistle of John, chapter 4

And every Spirit [Ruach] that confesses not that Yeshua [God is Salvation] Moshiach [Messiah] is come in the flesh is not of God-The Father: and this is that [Spirit [Ruach]] of antichrist, whereof you2f have heard that it should come; and even now already is it in the world.