2 Kings 23:6
6. brought out the grove—that is, Asherah, the mystic tree, placed by Manasseh in the temple [2Ki 21:5; 2Ch 33:5], removed by him after his conversion [2Ch 33:15], but replaced in the sanctuary by his wicked son Amon [2Ki 21:20, 21]. Josiah had it taken to Kidron, burnt the wood, ground the metal about it to powder, and strewed the ashes "on the graves of the children of the people." The poor were buried in a common on part of the valley of Kidron. But reference is here made to the graves "of those that had sacrificed" (2Ch 34:4).
2 Kings 23:15
15-20. Moreover the altar that was at Beth-el, &c.—Not satisfied with the removal of every vestige of idolatry from his own dominion, this zealous iconoclast made a tour of inspection through the cities of Samaria and all the territory formerly occupied by the ten tribes, destroying the altars and temples of the high places, consigning the Asherim to the flames, putting to death the priests of the high places, and showing his horror at idolatry by ransacking the sepulchers of idolatrous priests, and strewing the burnt ashes of their bones upon the altars before he demolished them.