2 Kings 23:20-24

He executed all the priests of the high places who were there, on the altars, and burned men’s bones on them; and he returned to Jerusalem.

Then the king commanded all the people, saying, “Keep the Passover to the Lord your God, as it is written in this Book of the Covenant.”

Such a Passover surely had never been held since the days of the judges who judged Israel, nor in all the days of the kings of Israel and the kings of Judah.

But in the eighteenth year of King Josiah this Passover was held before the Lord in Jerusalem.

Moreover Josiah put away those who consulted mediums and spiritists, the household gods and idols, all the abominations that were seen in the land of Judah and in Jerusalem, that he might perform the words of the law which were written in the book that Hilkiah the priest found in the house of the Lord.