1 Corinthians 14:8-10

New Century Version

⁸ And in a war, if the trumpet does not give a clear sound, who will prepare for battle? ⁹ It is the same with you. Unless you speak clearly with your tongue, no one can understand what you are saying. You will be talking into the air! ¹⁰ It may be true that there are all kinds of sounds in the world, and none is without meaning.