1 Corinthians 14:9

So also you, unless you uttered by the tongue words easy to understand, how would it be known what is spoken? For you would be speaking into the air.

1 Corinthians 9:26

I therefore run like that, as not uncertainly. I fight like that, as not beating the air,

Treasury of Scripture Knowledge

Summary

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.

Easy

1 Corinthians 14:19

For

1 Corinthians 9:26

Bible References

Easy

However in the assembly I would rather speak five words with my understanding, that I might instruct others also, than ten thousand words in another language.

For

I therefore run like that, as not uncertainly. I fight like that, as not beating the air,