1 Corinthians 14:24

In the law it is written, “By men of strange languages and by the lips of strangers I will speak to this people. They won’t even listen to me that way, says the Lord.”

Therefore other languages are for a sign, not to those who believe, but to the unbelieving; but prophesying is for a sign, not to the unbelieving, but to those who believe.

If therefore the whole assembly is assembled together and all speak with other languages, and unlearned or unbelieving people come in, won’t they say that you are crazy?

And thus the secrets of his heart are revealed. So he will fall down on his face and worship God, declaring that God is among you indeed.

What is it then, brothers? When you come together, each one of you has a psalm, has a teaching, has a revelation, has another language, or has an interpretation. Let all things be done to build each other up.

If any man speaks in another language, let there be two, or at the most three, and in turn; and let one interpret.