King James Version (KJV) - 1 Corinthians 14:9 >

So likewise ye, except ye utter by the tongue words easy to be understood, how shall it be known what is spoken? for ye shall speak into the air.

Berean Study Bible (BSB) - 1 Corinthians 14:9 >

So it is with you. Unless you speak intelligible words with your tongue, how will anyone know what you are saying? You will just be speaking into the air.