Ignatius — Epistle to the Smyrnaeans 7
They abstain from the Eucharist and from prayer, because they confess not the Eucharist to be the flesh of our Saviour Jesus Christ, which suffered for our sins, and which the Father, of His goodness, raised up again. Those, therefore, who speak against this gift of God, incur death in the midst of their disputes. But it were better for them to treat it with respect, that they also might rise again.
It is fitting, therefore, that you should keep aloof from such persons, and not to speak of them either in private or in public, but to give heed to the prophets, and above all, to the Gospel, in which the passion [of Christ] has been revealed to us, and the resurrection has been fully proved. But avoid all divisions, as the beginning of evils.
Greek
Εὐχαριστίας καὶ πρυσευχῆς ἀπέχονται, διὰ τὸ μὴ ὁμολογεῖν τὴν εὐχαριστίαν σάρκα εἶναι τοῦ σωτῆρος ἡμῶν Ἰησοῦ Χριστοῦ τὴν ὑπὲρ τῶν ἁμαρτιῶν ἡμῶν παθοῦσαν, ἣν τῇ χρηστότητι ὁ πατὴρ ἤγειρεν. οἱ οὖν ἀντιλέγοντες τῇ δωρεᾷ τοῦ θεοῦ συζητοῦντες ἀποθνήσκουσιν: συνέφερεν δε αὐτοῖς ἀγαπᾶν, ἵνα καὶ ἀναστῶσιν. πρέπον ἐστὶν ἀπέχεσθαι τῶν τοιούτων καὶ μήτε κατ’ ἰδίαν περὶ αὐτῶν λαλεῖν μήτε κοινῇ, προσέχειν δὲ τοῖς προφήταις, ἐξαιρέτως δὲ τῷ εὐαγγελίῳ, ἐν ᾧ τὸ πάθος ἡμῖν δεδήλωται καὶ ἡ ἀνάστασις τετελείωται. τοὺς δὲ μερισμοὺς φεύγετε ὡς ἀρχὴν κακῶν.