2 Kings 23:16

23:16 When Josiah turned around, he saw the tombs there on the hill. So he ordered the bones from the tombs to be brought; he burned them on the altar and defiled it. This fulfilled the Lord’s announcement made by the prophet while Jeroboam stood by the altar during a festival. King Josiah turned and saw the grave of the prophet who had foretold this.

2 Kings 23:20

23:20 He sacrificed all the priests of the high places on the altars located there, and burned human bones on them. Then he returned to Jerusalem.