1 Corinthians 14:12-13, 26-28

So with yourselves, since you are eager for manifestations of the Spirit, strive to excel in building up the church. Therefore, one who speaks in a tongue should pray that he may interpret.

What then, brothers? When you come together, each one has a hymn, a lesson, a revelation, a tongue, or an interpretation. Let all things be done for building up. If any speak in a tongue, let there be only two or at most three, and each in turn, and let someone interpret. But if there is no one to interpret, let each of them keep silent in church and speak to himself and to God.