Berean Standard Bible
1 Corinthians 14:20
“Brothers, stop thinking like children. In regard to evil be infants, but in your thinking be mature.”

In context
18I thank God that I speak in tongues more than all of you.
19But in the church, I would rather speak five coherent words to instruct others than ten thousand words in a tongue.
20Brothers, stop thinking like children. In regard to evil be infants, but in your thinking be mature.
21It is written in the Law: “By strange tongues and foreign lips I will speak to this people, but even then they will not listen to Me, says the Lord.”
22Tongues, then, are a sign, not for believers, but for unbelievers. Prophecy, however, is for believers, not for unbelievers.
Berean Standard Bible · A modern, readable English translation. Public domain (CC0).