1 Corinthians 14:22 ESV
Thus tongues are a sign not for believers but for unbelievers, while prophecy is a sign not for unbelievers but for believers.
1 Corinthians 14:23 ESV
If, therefore, the whole church comes together and all speak in tongues, and outsiders or unbelievers enter, will they not say that you are out of your minds?
1 Corinthians 14:24 ESV
But if all prophesy, and an unbeliever or outsider enters, he is convicted by all, he is called to account by all