Romans 10:14-15
How, then, shall they call on Him in Whom they believed not? and how shall they believe on Him of Whom they heard not? and how shall they hear without a preacher?
Ephesians 4:29
Let no corrupt speech proceed out of your mouth, but whatever is good for the supplying of the need, that it may give grace to those who hear.
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 believed not? and how shall they believe on Him of Whom they heard not? and how shall they hear without a preacher?
Ephesians 4:29
Let no corrupt speech proceed out of your mouth, but whatever is good for the supplying of the need, that it may give grace to those who hear.