1 Corinthians 14:21-23

Haweis(i) 21 In the law it is written, "That with other tongues, and with other lips, will I speak to this people: and even thus will they not attend to me, saith the Lord." 22 Wherefore tongues are for a sign, not to those that believe, but to those who do not believe: but the gift of prophecy is not for those who are infidels, but for believers. 23 If then the whole church assemble together in the same place, and all speak different tongues, and there come in illiterate persons, or infidels, will they not say ye are mad?