2 Kings 23:18-22

So he said, “Let him rest. Don’t let anyone disturb his bones.” So they left his bones undisturbed with the bones of the prophet who came from Samaria.

Josiah also removed all the shrines of the high places that were in the cities of Samaria, which the kings of Israel had made to anger the Lord. Josiah did the same things to them that he had done at Bethel.

He slaughtered on the altars all the priests of those high places, and he burned human bones on the altars. Then he returned to Jerusalem.

The king commanded all the people, “Observe the Passover of the Lord your God as written in the book of the covenant.”

No such Passover had ever been observed from the time of the judges who judged Israel through the entire time of the kings of Israel and Judah.