1 Corinthians 14:9
So likewise unless ye utter by the tongue words easy to be understood, how shall it be known what is spoken? For ye will speak to the air.
1 Corinthians 9:26
I therefore so run, not as uncertainly; I so fight, not as one that beateth the air.
Treasury of Scripture Knowledge
Summary
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.
Easy
Bible References
Easy
1 Corinthians 14:19
Yet in the congregation I had rather speak five words with my understanding, that I may teach others also, than ten thousand words in an unknown tongue.
For
1 Corinthians 9:26
I therefore so run, not as uncertainly; I so fight, not as one that beateth the air.