1 Corinthians 14:7, 9, 19
1 Corinthians 14:7 And even things without life giving sound, whether pipe or harp, except they give a distinction in the sounds, how shall it be known what is piped or harped? MC VC
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. 3 I MC VC
1 Corinthians 14:19 Yet in the church I had rather speak five words with my understanding, that by my voice I might teach others also, than ten thousand words in an unknown tongue. 5 I MC VC