2 Chronicles 35:17-18 NAS

17 Thus 1the sons of Israel who were present celebrated the Passover at that time, and the Feast of Unleavened Bread seven days.

References for 2 Chronicles 35:17

18 2There had not been celebrated a Passover like it 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.

References for 2 Chronicles 35:18