1 Corinthians 14:20 in the King James Version
Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men.
Context
19 However, in the assembly I would rather speak five words with my understanding, that I might instruct others also, than ten thousand words in another language.
20 Brothers, don’t be children in thoughts, yet in malice be babies, but in thoughts be mature.
21 In the law it is written, “By men of strange languages and by the lips of strangers I will speak to this people. They won’t even listen to me that way, says the Lord.”