Proverbs 20:15

There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.

This saying belongs to the portion of Proverbs written by Solomon. Gold is plentiful and rubies are many, yet lips that speak knowledge are a jewel more precious than them all. Such lips are a treasure of surpassing value because the knowledge they utter is expressed in wise speech. To speak in this knowledgeable way is a good and right use of the tongue.