Ignatius of Antioch, Epistle to the Ephesians 1.2
Now about Burrhus, my fellow slave and your deacon in God's service, blessed in every way: I pray that he may remain with you for your honor and for the honor of the bishop. And Crocus, worthy of God and of you, whom I received as an example of the love that comes from you, refreshed me in every way. May the Father of Jesus Christ refresh him as well, along with Onesimus, Burrhus, Euplus, and Fronto, through whom I saw all of you in love.
May I have joy of you through all time, if only I am worthy. It is fitting, then, to glorify Jesus Christ in every way, for he has glorified you, so that you may be knit together in one submission, submitting to the bishop and the council of elders, and be sanctified in every way.
Greek
Περὶ δὲ τοῦ συνδούλου μου Βούρρου, τοῦ κατὰ θεὸν διακόνου ὑμῶν ἐν πᾶσιν εὐλογημένου, εὔχομαι παραμεῖναι αὐτὸν εἰς τιμὴν ὑμῶν καὶ τοῦ ἐπισκόπου: καὶ Κρόκος δέ, ὁ θεοῦ ἄξιος καὶ ὑμῶν, ὅν ἐξεμπλάριον τῆς ἀφ̓ ὑμῶν ἀγάπης ἀπέλαβον, κατὰ πάντα με ἀνέπαυσεν, ὡς καὶ αὐτὸν ὁ πατὴρ Ἰησοῦ Χριστοῦ ἀναψύξαι, ἅμα Ὀνησίμῳ καὶ Βούρρῳ καὶ Εὔπλῳ καὶ Φρόντωνι, δἰ ὦν πάντας ὑμᾶς κατὰ ἀγάπην εἶδον.
ὀναίμην ὑμῶν διὰ παντός, ἐάνπερ ἄξιος ὦ. πρέπον οὗν ἐστὶν κατὰ πάντα τρόπον δοξάζειν Ἰησοῦν Χριστὸν τὸν δοξάσαντα ὑμᾶς, ἵνα ἐν μιᾷ ὑποταγῇ κατηρτισμένοι, ὑποτασσόμενοι τῷ ἐπισκόπῳ καὶ τῷ πρεσβυτερίῳ, κατὰ πάντα ἦτε ἡγιασμένοι.