1 Corinthians 14:23-27

Therefore if the whole church gathers together and all the people speak in tongues, and outsiders or unbelievers enter, will they not say that you are insane?

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

the secrets of his heart are disclosed; and so he will fall on his face and worship God, declaring that God is certainly among you.

What is the outcome then, brothers and sisters? When you assemble, each one has a psalm, has a teaching, has a revelation, has a tongue, has an interpretation. All things are to be done for edification.

If anyone speaks in a tongue, it must be by two or at the most three, and each one in turn, and one is to interpret;