2 Chronicles 35:10-15

10So the avodah was prepared and the kohanim stood at their posts with the Levites in their divisions according to the king’s command.

11They slaughtered the Passover lambs and while the kohanim sprinkled the blood handed to them, the Levites flayed them.

12Then they removed the portions to be burnt to give them to the divisions of ancestral houses of the people to present to Adonai, as it is written in the book of Moses. They did the same with the bulls.

13They roasted the Passover lambs with fire according to the ordinance, then boiled the sacred parts in pots, caldrons and pans, and brought them quickly to all the people.

14Afterward, they made preparations for themselves and for the kohanim, because the kohanim, the sons of Aaron, were busy sacrificing the burnt offerings and the fat until nightfall. So the Levites made preparations for themselves and for the kohanim, the sons of Aaron.

15The singers, the descendants of Asaph, were at their stations according to the commandment of David, Asaph, Heman and Jeduthun, the king’s seer. The gatekeepers were at every gate. They did not need to depart from their posts for their fellow Levites provided for them.