Ignatius of Antioch, Epistle to the Philadelphians 5.3
Keep away from the evil plants, which Jesus Christ does not cultivate, because they are not the Father's planting. I did not find division among you, but a filtering out of what is false.
For all who belong to God and Jesus Christ are with the bishop. And all who repent and come to the unity of the church will also belong to God, so that they may live according to Jesus Christ.
Do not be deceived, my brothers and sisters: if anyone follows one who makes a division, that person does not inherit the kingdom of God. If anyone follows someone else's teaching, that person does not share in the passion.
Greek
Ἀπέχεσθε τῶν κακῶν βοτανῶν, ἅστινας οὐ γεωργεῖ Ἰησοῦς Χριστός, διὰ τὸ μὴ εἶναι αὐτοὺς φυτείαν πατρός: οὐχ ὅτι παῤ ὑμῖν μερισμὸν εὗρον, ἀλλ’ ὰποδιῡλισμόν.
ὅσοι γὰρ θεοῦ εἰσιν καὶ Ἰησοῦ Χριστοῦ, οὗτοι μετὰ τοῦ ἐπισκόπου εἰσίν. καὶ ὅσοι ἂν μετανοήσαντες ἔλθωσιν ἐπὶ τὴν ἑνότητα τῆς ἐκκλησίας, καὶ οὗτοι θεοῦ ἔσονται, ἵνα ὦσιν κατὰ Ἰησοῦν Χριστὸν ζῶντες.
μὴ πλανᾶσθε, ἀδελφοί μου: εἴ τις σχίζοντι ἀκολουθεῖ. βασιλείαν θεοῦ οὐ κληρονομεῖ: εἴ τις ἐν ἀλλοτρίᾳ γνώμῃ περιπατεῖ, οὗτος τῷ πάθει οὐ συγκατατίθεται.