15 Moreover the altar that was at Bethel, the high place that Jeroboam the son of Nebat, who caused Israel to sin, had made, both that altar and the high place he broke down; and burned the high place, stamped it small to powder, and burned the Asherah. 16 And Josiah turned himself, and saw the sepulchres that were there on the mount; and he sent and took the bones out of the sepulchres, and burned [them] upon the altar, and defiled it, according to the word of Jehovah, that the man of God had proclaimed, who proclaimed these things. 17 Then he said, What tombstone is that which I see? And the men of the city told him, It is the sepulchre of the man of God who came from Judah and proclaimed these things which thou hast done against the altar of Bethel. 18 And he said, Let him alone; let no man move his bones. And they saved his bones, with the bones of the prophet that came out of Samaria. 19 And all the houses also of the high places that were in the cities of Samaria, which the kings of Israel had made to provoke [Jehovah] to anger, Josiah removed, and did to them according to all the acts that he had done in Bethel. 20 And he sacrificed upon the altars all the priests of the high places that were there, and burned men's bones upon them. And he returned to Jerusalem.
21 And the king commanded all the people saying, Hold the passover to Jehovah your God, as it is written in this book of the covenant. 22 For there was not holden such a passover from the days of the judges that judged Israel, nor in all the days of the kings of Israel, nor of the kings of Judah; 23 but in the eighteenth year of king Josiah was this passover holden to Jehovah in Jerusalem.
24 Moreover the necromancers and the soothsayers, and the teraphim and the idols, and all the abominations that were seen in the land of Judah and in Jerusalem, Josiah took away, that he might perform the words of the law which were written in the book that Hilkijah the priest had found in the house of Jehovah.
Matthew Henry's Commentary on 2 Kings 23:15-24
Commentary on 2 Kings 23:15-24
(Read 2 Kings 23:15-24)
Josiah's zeal extended to the cities of Israel within his reach. He carefully preserved the sepulchre of that man of God, who came from Judah to foretell the throwing down of Jeroboam's altar. When they had cleared the country of the old leaven of idolatry, then they applied themselves to the keeping of the feast. There was not holden such a passover in any of the foregoing reigns. The revival of a long-neglected ordinance, filled them with holy joy; and God recompensed their zeal in destroying idolatry with uncommon tokens of his presence and favour. We have reason to think that during the remainder of Josiah's reign, religion flourished.