Ignatius of Antioch, Epistle to the Magnesians 6
In the persons I have named I have looked on your whole congregation in faith, and I have loved it. So I urge you: be eager to do everything in God's own harmony, with the bishop presiding in the place of God, the presbyters in the place of the council of the apostles, and the deacons, so very dear to me, entrusted with the ministry of Jesus Christ, who was with the Father before the ages and at the end was revealed.
All of you, then, having received God's own character, respect one another. Let no one regard his neighbor according to the flesh; love one another in Jesus Christ, always. Let nothing be among you that could divide you. Be one with the bishop and with those who preside, as a pattern and a lesson of incorruption.
Greek
Ἐπεὶ οὖν ἐν τοῖς προγεγραμμένοις προσώποις τὸ πᾶν πλῆθος ἐθεώρησα ἐν πίστει καὶ ἠγάπησα, παραινῶ, ἐν ὁμονοίᾳ θεοῦ σπουδάζετε πάντα πράσσειν, προκαθημένου τοῦ ἐπισκόπου εἰς τόπον θεοῦ καὶ τῶν πρεσβυτέρων εἰς τόπον συνεδρίου τῶν ἀποστόλων, καὶ τῶν διακόνων τῶν ἐμοὶ γλυκυτάτων πεπιστευμένων διακονίαν Ἰησοῦ Χριστοῦ, δς πρὸ αἰώνων παρὰ πατρὶ ἦν καὶ ἐν τέλει ἐφάνη.
πάντες οὖν ὁμοήθειαν θεοῦ λαβόντες ἐντρέπεσθε ἀλλήλους καὶ μηδεὶς κατὰ σάρκα βλεπέτω τὸν πλησίον, ἀλλ’ ἐν Ἰησοῦ Χριστῷ ἀλλήλους διὰ παντὸς ἀγαπᾶτε. μηδὲν ἔστω ἐν ὑμῖν, ὃ δυνήσεται ὑμᾶς μερίσαι ἀλλ’ ἑνώθητε τῷ ἐπισκόπῳ καὶ τοῖς προκαθημένοις εἰς τύπον καὶ διδαχὴν ἀφθαρσίας.