1 Corinthians 14:20-22

Revised Standard Version

²⁰ Brethren, do not be children in your thinking; be babes in evil, but in thinking be mature. ²¹ In the law it is written, “By men of strange tongues and by the lips of foreigners will I speak to this people, and even then they will not listen to me, says the Lord.” ²² Thus, tongues are a sign not for believers but for unbelievers, while prophecy is not for unbelievers but for believers.