2 Chronicles 35:16-19

The entire ceremony for the LORD’s Passover was completed that day. All the burnt offerings were sacrificed on the altar of the LORD, as King Josiah had commanded. All the Israelites present in Jerusalem celebrated Passover and the Festival of Unleavened Bread for seven days. 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. This Passover was celebrated in the eighteenth year of Josiah’s reign.