Proverbs 20:15 in the World English Bible
There is gold and abundance of rubies, but the lips of knowledge are a rare jewel.
Context
14 It is naught, it is naught, saith the buyer: but when he is gone his way, then he boasteth.
15 There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.
16 Take his garment that is surety for a stranger: and take a pledge of him for a strange woman.