1 Corinthians 14:9

So, also, ye, through means of the tongue, except ye give intelligible discourse, how shall it be known what is being spoken? for ye will be speaking, to the air.

1 Corinthians 9:26

I, therefore, so, am running, as, not uncertainly, so, am boxing, as not thrashing 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

But, in assembly, I desire to speak five words with my mind, that, others also, I may instruct, than myriads of words in a tongue.

For

I, therefore, so, am running, as, not uncertainly, so, am boxing, as not thrashing air;