Didache 9
Now concerning the Thanksgiving (Eucharist), thus give thanks. First, concerning the cup: We thank you, our Father, for the holy vine of David Your servant, which You made known to us through Jesus Your Servant; to You be the glory forever. And concerning the broken bread: We thank You, our Father, for the life and knowledge which You made known to us through Jesus Your Servant; to You be the glory forever.
Even as this broken bread was scattered over the hills, and was gathered together and became one, so let Your Church be gathered together from the ends of the earth into Your kingdom; for Yours is the glory and the power through Jesus Christ forever. But let no one eat or drink of your Thanksgiving (Eucharist), but they who have been baptized into the name of the Lord; for concerning this also the Lord has said, Give not that which is holy to the dogs. Matthew 7:6
Greek
Περὶ δὲ τῆς εὐχαριστίας, οὕτως εὐχαριστήσατε: πρῶτον περὶ τοῦ ποτηρίου: Εὐχαριστοῦμέν σοι, πάτερ ἡμῶν, ὑπὲρ τῆς ἁγίας ἀμπέλου Δαυεὶδ τοῦ παιδός σου, ἦς ἐγνώρισας ἡμῖν διὰ Ἰησοῦ τοῦ παιδός σου: σοὶ ἡ δόξα εἰς τοὺς αἰῶνας. περὶ δὲ τοῦ κλάσματος: Εὐχαριστοῦμέν σοι, πάτερ ἡμῶν, ὑπὲρ τῆς ζωῆς καὶ γνώσεως, ἦς ἐγνώρισας ἡμῖν διὰ Ἰησοῦ τοῦ παιδός σου. σοὶ ἡ δόξα εἰς τοὺς αἰῶνας. ὥσπερ ἦν τοῦτο τὸ κλάσμα διεσκορπισμένον ἐπάνω τῶν ὀρέων καὶ συναχθὲν ἐγένετο ἕν, οὕτω συναχθήτω σου ἡ ἐκκλησία ἀπὸ τῶν περάτων τῆς γῆς εἰς τὴν σὴν βασιλείαν. ὅτι σοῦ ἐστιν ἡ δόξα καὶ ἡ δύναμις διὰ Ἰησοῦ Χριστοῦ εἰς τοὺς αἰῶνας. μηδεὶς δὲ φαγέτω μηδὲ πιέτω ἀπὸ τῆς εὐχαριστίας ὑμῶν, ἀλλ’ οἱ βαπτισθέντες εἰς ὄνομα κυρίου: καὶ γὰρ περὶ τούτου εἴρηκεν ὁ κύριος: Μὴ δῶτε τὸ ἄγιον τοῖς κυσί.