2 Chronicles 35:11-15

They slaughtered the Passover animals, and while the priests sprinkled the blood received from their hand, the Levites skinned the animals.

Then they removed the burnt offerings so that they might give them to the sections of the fathers’ households of the lay people to present to the Lord, as it is written in the Book of Moses. They did this with the bulls as well.

So they roasted the Passover animals on the fire according to the ordinance, and they boiled the holy things in pots, in kettles, and in pans and carried them quickly to all the lay people.

Afterward they prepared for themselves and for the priests, because the priests, the sons of Aaron, were offering the burnt offerings and the fat until night; so the Levites prepared for themselves and for the priests, the sons of Aaron.

The singers, the sons of Asaph, were also at their positions according to the command of David, Asaph, Heman, and Jeduthun the king’s seer; and the gatekeepers at each gate did not have to leave their service, because their kinsmen the Levites prepared for them.