Proverbs 17:3 The refining pot is for silver, and the furnace for gold, but Yahweh tests the hearts. (Root in WEB KJV JPS ASV DBY WBS YLT NAS)
Proverbs 27:21 As the fining pot for silver, and the furnace for gold; so is a man to his praise. (KJV JPS ASV DBY WBS YLT)