1 Corinthians 14:9-11 Lexham English Bible (LEB)
9 And so you through the tongue, unless you produce a clear message, how will it be known what is spoken? For you will be speaking into the air. 10 There are probably so many kinds of languages in the world, and none without meaning. 11 Therefore, if I do not know the meaning of the language, I will be a barbarian to the one who is speaking, and the one who is speaking will be a barbarian in my judgment.