1 Corinthians 14:22-24

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

23Therefore if the whole church gathers together and all the people speak in tongues, and 2outsiders or unbelievers enter, will they not say that 3you are insane?

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