2 Chronicles 34:3
“For in the eighth year of his reign, while he was yet young, he began to seek after the God of David his father: and in the twelfth year he began to purge Judah and Jerusalem from the high places, and the groves, and the carved images, and the molten images.”
Josiah was eight years old when he began to reign, and he reigned in Jerusalem one and thirty years.
And he did that which was right in the sight of the Lord, and walked in the ways of David his father, and declined neither to the right hand, nor to the left.
For in the eighth year of his reign, while he was yet young, he began to seek after the God of David his father: and in the twelfth year he began to purge Judah and Jerusalem from the high places, and the groves, and the carved images, and the molten images.
And they brake down the altars of Baalim in his presence; and the images, that were on high above them, he cut down; and the groves, and the carved images, and the molten images, he brake in pieces, and made dust of them, and strowed it upon the graves of them that had sacrificed unto them.
And he burnt the bones of the priests upon their altars, and cleansed Judah and Jerusalem.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“For he took away the altars of the strange gods, and the high places, and brake down the images, and cut down the groves:”
“Now in the eighteenth year of his reign, when he had purged the land, and the house, he sent Shaphan the son of Azaliah, and Maaseiah the governor of the city, and Joah the son of Joahaz the recorder, to repair the house of the Lord his God.”
“And when he had broken down the altars and the groves, and had beaten the graven images into powder, and cut down all the idols throughout all the land of Israel, he returned to Jerusalem.”
“And he took away the strange gods, and the idol out of the house of the Lord, and all the altars that he had built in the mount of the house of the Lord, and in Jerusalem, and cast them out of the city.”
“And he brought all the priests out of the cities of Judah, and defiled the high places where the priests had burned incense, from Geba to Beer–sheba, and brake down the high places of the gates that were in the entering in of the gate of Joshua the governor of the city, which were on a man’s left hand at the gate of the city.”