Proverbs 17:3

3 The crucible for silver and the furnace for gold, but the LORD tests the heart.

Read Proverbs 17:3 Using Other Translations

The fining pot is for silver, and the furnace for gold: but the LORD trieth the hearts.
The crucible is for silver, and the furnace is for gold, and the LORD tests hearts.
Fire tests the purity of silver and gold, but the LORD tests the heart.