1 Corinthians 14:23-28

23If, therefore, the whole church comes together and all speak in tongues, and outsiders or unbelievers enter, will they not say that you are out of your minds?

24But if all prophesy, and an unbeliever or outsider enters, he is convicted by all, he is called to account by all,

25the secrets of his heart are disclosed, and so, falling on his face, he will worship God and declare that God is really among you.

26What 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.

27If any speak in a tongue, let there be only two or at most three, and each in turn, and let someone interpret.

28But if there is no one to interpret, let each of them keep silent in church and speak to himself and to God.