Ignatius — Epistle to the Ephesians 4
Wherefore it is fitting that you should run together in accordance with the will of your bishop, which thing also you do. For your justly renowned presbytery, worthy of God, is fitted as exactly to the bishop as the strings are to the harp. Therefore in your concord and harmonious love, Jesus Christ is sung.
And man by man, become a choir, that being harmonious in love, and taking up the song of God in unison, you may with one voice sing to the Father through Jesus Christ, so that He may both hear you, and perceive by your works that you are indeed the members of His Son. It is profitable, therefore, that you should live in an unblameable unity, that thus you may always enjoy communion with God.
Greek
Ὅθεν πρέπει ὑμῖν συντρέχειν τῇ τοῦ ἐπισκόπου γνώμῃ, ὅπερ καὶ ποιεῖτε. τὸ γὰρ ἀξιονόμαστον ὑμῶν πρεσβυτέριον, τοῦ θεοῦ ἄξιον, οὕτως συνήρμοσται τῷ ἐπισκόπῳ, ὡς χορδαὶ κιθάρᾳ. διὰ τοῦτο ἐν τῇ ὁμονοίᾳ ὑμῶν καὶ συμφώνῳ ἀγάπῃ Ἰησοῦς Χριστὸς ᾅδεται. καὶ οἱ κατ’ ἄνδρα δὲ χορὸς γίνεσθε, ἵνα σύμφωνοι ὄντες ἐν ὁμονοίᾳ, χρῶμα θεοῦ λαβόντες ἐν ἑνότητι, ᾅδητε ἐν φωνῇ μιᾷ διὰ Ἰησοῦ Χριστοῦ τῷ πατρί, ἵνα ὑμῶν καὶ ἀκούσῃ καὶ ἐπιγινώσκῃ, δἰ ὦν εὖ πράσσετε, μέλη ὄντας τοῦ υἱοῦ αὐτοῦ. χρήσιμον οὖν ἐστὶν ὑμᾶς ἐν ἀμώμῳ ἑνότητι εἶναι, ἵνα καὶ θεοῦ πάντοτε μετέχητε.