2 Chronicles 35:16-19

So all the service of the LORD was prepared on that day to celebrate the Passover, and to offer burnt offerings on the altar of the LORD, in accordance with the command of King Josiah. Thus the sons of Israel who were present celebrated the Passover at that time, and the Feast of Unleavened Bread for seven days. No Passover like it had been celebrated in Israel since the days of Samuel the prophet; nor had any of the kings of Israel celebrated such a Passover as Josiah did with the priests, the Levites, all Judah and Israel who were present, and the inhabitants of Jerusalem. In the eighteenth year of Josiah’s reign this Passover was celebrated.