2 Chronicles 28:2-4

2Instead he walked in the ways of the kings of Israel, and even made cast images for the Baals.

3And he burned incense in the Valley of Ben-hinnom and burned his sons [as an offering], in accordance with the repulsive acts of the [pagan] nations whom the Lord had driven out before the sons (descendants) of Israel.

4He also sacrificed and burned incense on the high places [of pagan worship], on the hills and under every green tree.