2 Chronicles 35:16-19

16So all the service of Yhwh was prepared the same day, to keep the passover, and to offer burnt offerings upon the altar of Yhwh, according to the commandment of king Josiah.

17And the children of Israel that were present kept the passover at that time, and the feast of unleavened bread seven days.1

18And there was no passover like to that kept in Israel from the days of Samuel the prophet; neither did all the kings of Israel keep such a passover as Josiah kept, and the priests, and the Levites, and all Judah and Israel that were present, and the inhabitants of Jerusalem.2

19In the eighteenth year of the reign of Josiah was this passover kept.