Proverbs 17:3

The fining pot is for silver, and the furnace for gold: but the LORD trieth the hearts.
— Proverbs 17:3, King James Version

In other translations

World English Bible (WEB)

The refining pot is for silver, and the furnace for gold, But Yahweh tests the hearts.

American Standard Version (ASV)

The refining pot is for silver, and the furnace for gold; But Jehovah trieth the hearts.

Young's Literal Translation (YLT)

A refining pot <FI>is<Fi> for silver, and a furnace for gold, And the trier of hearts <FI>is<Fi> Jehovah.