1 Corinthians 14:19-21

International Standard Version

¹⁹But in church I would rather speak five words with my mind to instruct others than 10,000 words in a foreign language.

²⁰Brothers, stop being^[a] childish in your thinking. Be like infants with respect to evil, but think like adults. ²¹In the Law it is written,

“By means of foreign languages
    and through the mouths of foreigners
I will speak to this people,
    but even then they will not listen to me,”^[b]
        declares the Lord.