Romans 10:14-15
How then shall thy call upon Him in whom they do not believe? And how are they to believe in One of whom they have never heard? And how shall they hear without a preacher?
Ephesians 4:29
From your lips let no evil words come forth, but such as occasion warrants, such as are good for upbuilding and give a blessing 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
How then shall thy call upon Him in whom they do not believe? And how are they to believe in One of whom they have never heard? And how shall they hear without a preacher?
Ephesians 4:29
From your lips let no evil words come forth, but such as occasion warrants, such as are good for upbuilding and give a blessing to the hearers.