2 Chronicles 35:17-18 NLT

17 All the Israelites present in Jerusalem celebrated Passover and the Festival of Unleavened Bread for seven days.
18 Never since the time of the prophet Samuel had there been such a Passover. None of the kings of Israel had ever kept a Passover as Josiah did, involving all the priests and Levites, all the people of Jerusalem, and people from all over Judah and Israel.