If anyone speaks in a tongue, let there be two or at the most three, each in turn, and let one interpret.
1 Corinthians 14:27
Surrounding context
14:26 How is it then, brethren? Whenever you come together, each of you has a psalm, has a teaching, has a tongue, has a revelation, has an interpretation. Let all things be done for edification.
14:27 If anyone speaks in a tongue, let there be two or at the most three, each in turn, and let one interpret.
14:28 But if there is no interpreter, let him keep silent in church, and let him speak to himself and to God.