2 Chronicles 34:1-3

Josiah was eight years old when he became king, and he ruled thirty-one years in Jerusalem. He did what the LORD said was right. He lived as his ancestor David had lived, and he did not stop doing what was right. In his eighth year as king while he was still young, Josiah began to obey the God of his ancestor David. In his twelfth year as king, Josiah began to remove from Judah and Jerusalem the gods, the places for worshiping gods, the Asherah idols, and the wooden and metal idols.