1 Corinthians 14:22-24

New Revised Standard Version, Anglicised Catholic Edition

²² Tongues, then, are a sign not for believers but for unbelievers, while prophecy is not for unbelievers but for believers. ²³ 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 mind? ²⁴ But if all prophesy, an unbeliever or outsider who enters is reproved by all and called to account by all.