I Corinthians 14:12-13, 26-28

Even so you, since you are zealous for spiritual gifts, let it be for the edification of the church that you seek to excel. Therefore let him who speaks in a tongue pray that he may interpret.

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. If anyone speaks in a tongue, let there be two or at the most three, each in turn, and let one interpret. But if there is no interpreter, let him keep silent in church, and let him speak to himself and to God.