https://www.btstories.com/joash/

Joash was seven years old when he became king of Judah. Jehoiada, the high priest, taught the king and helped him live a godly life. As long as Jehoiada lived, Joash followed the ways of the Lord.

When the king was older, he decided to make repairs on the Temple of the Lord. Athaliah had taken every thing of value out of it to use in the worship of Baal.