1 Corinthians 14:9-11

WNT(i) 9 And so with you; if with the living voice you fail to utter intelligible words, how will people know what you are saying? You will be talking to the winds. 10 There are, we will suppose, a great number of languages in the world, and no creature is without a language. 11 If, however, I do not know the meaning of the particular language, I shall seem to the speaker of it, and he to me, to be merely talking some foreign tongue.