Parallel
1 John 4:3
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
καὶ πᾶν πνεῦμα ὃ μὴ ὁμολογεῖ Ἰησοῦν χριστὸν ἐν σαρκὶ ἐληλυθότα, ἐκ τοῦ θεοῦ οὐκ ἔστιν· καὶ τοῦτό ἐστιν τὸ τοῦ ἀντιχρίστου, ὃ ἀκηκόατε ὅτι ἔρχεται, καὶ νῦν ἐν τῷ κόσμῳ ἐστὶν ἤδη.
and every spirit that does not confess Jesus (note: BYZ and TR that Jesus Christ has come in the flesh) is not from God. This is the spirit of the antichrist, which you have heard is coming and which is already in the world at this time.