1 Corinthians 14:28

But if there be no interpreter (ean de mh h diermhneuth). Third class condition. Earliest known instance and possibly made by Paul from verb in verse Luke 27 . Reappears in Byzantine grammarians. Keep silence in church (sigatw en ekklhsiai). Linear action (present active imperative). He is not even to speak in a tongue once. He can indulge his private ecstasy with God.