1 Corinthians 14:22-24

22Wherefore tongues are for a sign, not to them that believe, but to the unbelieving: but prophesying is for a sign, not to the unbelieving, but to them that believe. 23If therefore the whole church be assembled together and all speak with tongues, and there come in men unlearned or unbelieving, will they not say that ye are mad? 24But if all prophesy, and there come in one unbelieving or unlearned, he is reproved by all, he is judged by all;