King Josiah's campaign to purify the land from idolatry reaches a dramatic historical climax in Bethel. By destroying the central worship site of the Kingdom of Israel, he brings an ancient prophecy to life. The king sets out to defile the altar originally built by Jeroboam, which had served as the focal point for the worship of the golden calves. To accomplish this, he burns human bones directly upon it [ביאור שטיינזלץ]. These bones are taken from graves located right there on the mountain of Bethel [מצודת דוד, אברבנאל].
The presence of graves so close to the altar is not a coincidence. Idolaters intentionally placed their cemeteries near their places of worship, driven by a deep connection to ritual impurity. It is this very proximity that confirms for Josiah that these are the graves of those who worshipped the golden calves [מלבי״ם]. By burning these specific bones, the king achieves a dual purpose. First, he completely defiles the altar, rendering it permanently unfit for idol worship [ביאור שטיינזלץ]. Second, he publicly disgraces the dead who had devoted their lives to idolatry [מצודת דוד, אברבנאל].
However, Josiah does not act recklessly. He carefully inspects the graves to ensure he only extracts the bones of sinners. Thanks to this precision, the bones of the man of God are spared. Consequently, the bones of the false prophet from Samaria, who was buried in the exact same grave, are also saved from the fire [רלב״ג].
This entire event serves as the fulfillment of a prophecy delivered by the man of God generations earlier, during the reign of Jeroboam. He had foretold that a king named Josiah would one day burn human bones upon this very altar. The narrative emphasizes this exact realization of the original declaration, highlighting how the events unfold precisely as predicted [מצודת דוד]. A fascinating question remains about the king's awareness during this act. It is uncertain whether Josiah knew of the ancient prophecy and intentionally set out to fulfill it, or if he acted entirely on his own initiative, unknowingly bringing the word of God to life [ביאור שטיינזלץ].