27. κατὰ δύο. There must not be more than two, or at the utmost three discourses, because the long utterance in an unknown tongue would weary the Church without a sufficient corresponding benefit.
ὀνὰ μέρος. Literally, in turn.
εἷς διερμηνευέτω. Let there be one, and only one, interpreter of each speech; for if the second interpretation were the same as the first it were unnecessary; if different, it would be perplexing.