2 Kings 23:19-23

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 took away, and did to them according to all the acts that he had done in Beth-el.

And he slew all the priests of the high places that were there, upon the altars, and burned men’s bones upon them; and he returned to Jerusalem.

And the king commanded all the people, saying, Keep the passover unto Jehovah your God, as it is written in this book of the covenant.

Surely there was not kept 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;

but in the eighteenth year of king Josiah was this passover kept to Jehovah in Jerusalem.