Proverbs 10:20 in the World English Bible
The tongue of the righteous is like choice silver. The heart of the wicked is of little worth.
Context
19 In the multitude of words there wanteth not sin: but he that refraineth his lips is wise.
20 The tongue of the just is as choice silver: the heart of the wicked is little worth.
21 The lips of the righteous feed many: but fools die for want of wisdom.