2 Chronicles 35:12-18

ISV(i) 12 They set aside in reserve the burnt offerings, so they could distribute them in proportion to the divisions of their ancestral households for presentation by the people to the LORD, as is required by the book of Moses. They did this with respect to the bulls, also. 13 They roasted the Passover in fire, as required by the ordinances, and boiled the holy things in pots, kettles, and pans, and delivered them quickly to all the people. 14 After this, because the priests, who were descendants of Aaron, were busy offering the burnt offerings and fat portions until evening, the descendants of Levi prepared the Passover for themselves and their fellow-descendants of Aaron, the priests. 15 The singers, as descendants of Asaph, remained at their stations as David, Asaph, Heman, and the king’s seer Jeduthun required, and the gatekeepers did not have to leave their posts because their descendant of Levi relatives prepared the Passover for them.
16 That’s how the LORD’s service was prepared that day to celebrate the Passover and to offer burnt offerings on the LORD’s altar according to what King Josiah had commanded. 17 The Israelis who were present celebrated the Passover that day, as well as the Festival of Unleavened Bread for seven days. 18 There had not been a Passover celebration like it in Israel since Samuel the prophet was alive, nor had any of the kings of Israel celebrated a Passover like Josiah did at that time with the priests, the descendants of Levi, everyone from Judah and Israel who were present, and the inhabitants of Jerusalem.