1 Corinthians 14:21-23

New Testament for Everyone

²¹ This is what it says in the law: “I will speak to this people in foreign languages and with the lips of strangers, and even so they won’t listen to me, says the Lord.” ²² So tongues are not meant for believers, but are a warning for unbelievers; while prophecy is not designed for unbelievers, but for those who come to faith. ²³ What I mean is this: if the whole assembly comes together and everybody speaks in tongues, and outsiders or unbelievers come in, they’ll say you’re crazy, won’t they?