2 Kings 23:15-17
23:15 He also tore down the altar in Bethel at the high place made by Jeroboam son of Nebat, who encouraged Israel to sin. He burned all the combustible items at that high place and crushed them to dust; including the Asherah pole.
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.
23:17 He asked, “What is this grave marker I see?” The men from the city replied, “It’s the grave of the prophet who came from Judah and foretold these very things you have done to the altar of Bethel.”