Solomon
Proverbs 10:20ESV·traditional attribution

The tongue of the righteous is choice silver; the heart of the wicked is of little worth.

Matthew Henry Presbyterian @wholebiblehenry

We are here taught how to value men, not by their wealth and preferment in the world, but by their virtue. I. Good men are good for something. Though they may be poor and low in the world, and may not have power and riches to do good with, yet, as long as they have a mouth to speak, that will make them valuable and...

Commenting on Proverbs 10:20-21

John Gill Reformed Baptist @doctorgill

The tongue of the just is as choice silver,.... Which utters things precious, pure, pleasant, and profitable; things for worth and value as choice silver; the doctrines of the Gospel, the power of which he has felt upon his heart; the precious promises of it, which have been applied unto him; and the rich experience of grace he has been favoured with: things pure and...

Jamieson-Fausset-Brown Reformed @jfbcommentary

Right speech is the fruit of a good heart, but the wicked show theirs to be useless.