1 Corinthians 14:26-28

26What then is the right course, believers? When you meet together, each one has a psalm, a teaching, a revelation (disclosure of special knowledge), a tongue, or an interpretation. Let everything be constructive and edifying and done for the good of all the church.

27If anyone speaks in a tongue, it should be limited to two or at the most three, and each one speaking in turn, and one must interpret [what is said].

28But if there is no one to interpret, the one [who wishes to speak in a tongue] must keep silent in church; let him speak to himself and to God.