1 Corinthians 14:27-29

Young's Literal Translation

²⁷ if an [unknown] tongue any one do speak, by two, or at the most, by three, and in turn, and let one interpret;

²⁸ and if there may be no interpreter, let him be silent in an assembly, and to himself let him speak, and to God.

²⁹ And prophets -- let two or three speak, and let the others discern,