Romans 10:14-15
How then 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 foul language proceed out of your mouth, but whatever is good for edification, as the need may be, that it may benefit 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
How then 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 foul language proceed out of your mouth, but whatever is good for edification, as the need may be, that it may benefit the hearers;