Romans 10:14-15
But how shall they call on him in whom they have not believed? And how shall they believe in him, of whom they have not heard? And how shall they hear without a preacher?
Ephesians 4:29
Let no corrupt discourse proceed out of your mouth, but that which is good, to the use of edifying, that it may minister grace to the hearers.
Treasury of Scripture Knowledge
Summary
There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.
Bible References
But
Romans 10:14
But how shall they call on him in whom they have not believed? And how shall they believe in him, of whom they have not heard? And how shall they hear without a preacher?
Ephesians 4:29
Let no corrupt discourse proceed out of your mouth, but that which is good, to the use of edifying, that it may minister grace to the hearers.