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.

Cross-References
“For thus saith the Lord unto the house of Israel, Seek ye me, and ye shall live:”
“Thou shalt not bow down to their gods, nor serve them, nor do after their works: but thou shalt utterly overthrow them, and quite break down their images.”
“Save that the high places were not removed: the people sacrificed and burnt incense still on the high places.”
“But ye shall destroy their altars, break their images, and cut down their groves:”
“And it shall come to pass, as soon as I am gone from thee, that the Spirit of the Lord shall carry thee whither I know not; and so when I come and tell Ahab, and he cannot find thee, he shall slay me: but I thy servant fear the Lord from my youth.”