Just as silver is tested by fire, and gold is tested in the furnace, so also does the Lord test hearts
Other versions
King James Version
The fining pot is for silver, and the furnace for gold: but the LORD trieth the hearts.English Standard Version
The crucible is for silver, and the furnace is for gold, and the LORD tests hearts.New International Version
The crucible for silver and the furnace for gold, but the LORD tests the heart.