1 Corinthians 14:22-24

22So then tongues are for a sign, not to those who believe but to unbelievers; but 1prophecy is for a sign, not to unbelievers but to those who believe.

23Therefore if the whole church assembles together and all speak in tongues, and 2ungifted men or unbelievers enter, will they not say that 3you are mad?

24But if all 4prophesy, and an unbeliever or an 5ungifted man enters, he is 6convicted by all, he is called to account by all;