Romans 10:14-15
How then can they call on him in whom they have not believed? And how can they believe in him of whom they have not heard? And how can they hear without a preacher?
Ephesians 4:29
Let no unwholesome talk come out of your mouths, but only such as is good for building others up according to the need of the moment, that it may impart 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 can they call on him in whom they have not believed? And how can they believe in him of whom they have not heard? And how can they hear without a preacher?
Ephesians 4:29
Let no unwholesome talk come out of your mouths, but only such as is good for building others up according to the need of the moment, that it may impart grace to those who hear.