1 John 4:3

3andκαὶanyπᾶνspiritπνεῦμαthatὃnotμὴconfessesὁμολογεῖτὸνJesusἸησοῦνfromἐκτοῦGodθεοῦnotοὐκisἔστιν·Andκαὶthisτοῦτόisἐστινthatτὸof theτοῦantichristἀντιχρίστου,whichὃyou heardἀκηκόατεthatὅτιis comingἔρχεται,andκαὶnowνῦνinἐνtheτῷworldκόσμῳisἐστὶνalreadyἤδη.

and every spirit that does not confess Jesus is not of God, and this is that of the antichrist, which you⁺ heard that is coming, and now is already in the world.