2 Kings 23:19-21
19 Josiah also removed all the houses of the high places which were in the cities of Samaria, which the kings of Israel had made provoking the Lord [to anger]; and he did to them just as he had done [to those] in Bethel. 20 All the priests of the high places who were there he slaughtered on the altars, and burned human bones on them [to desecrate the places forever]. Then he returned to Jerusalem.
21 Then the king commanded all the people, saying, “Celebrate the Passover to the Lord your God as it is written in this book of the covenant.”Read full chapter