1 Corinthians 14:9-11 So also you, unless you give intelligible speech with the tongue, how will it be known what is being spoken? For you will be speaking into the air.

BLB⁽ⁱ⁾ ⁹ So also you, unless you give intelligible speech with the tongue, how will it be known what is being spoken? For you will be speaking into the air. ¹⁰ There are, if it may be, so many kinds of languages in the world, and none without meaning. ¹¹ Therefore unless I know the power of the sound, I will be a barbarian to the one speaking, and the one speaking, a barbarian to me.