Ignatius to the Philadelphians

Be ye careful therefore to observe one eucharist (for there is one flesh of our Lord Jesus Christ and one cup unto union in His blood; there is one altar, as there is one bishop, together with the presbytery and the deacons my fellow-servants), that whatsoever ye do, ye may do it after God.

Σπουδάσατε οὖν μιᾷ εὐχαριστίᾳ χρῆσθαι: μία γὰρ σὰρξ τοῦ κυρίου ἡμῶν Ἰησοῦ Χριστοῦ καὶ ἓν ποτήριον εἰς ἕνωσιν τοῦ αἵματος αὐτοῦ, ἓν θυσιαστήριον, ὡς εἷς ἐπίσκοπος ἅμα τῷ πρεσβυτερίῳ καὶ διακόνοις τοῖς συνδούλοις μου: ἵνα, ὃ ἐὰν πράσσητε, κατὰ θεὸν πράσσητε.