2 Chronicles 35:10-15

10So the service was prepared; the priests stood in their places and the Levites in their divisions according to the king’s command. 11And they slaughtered the Passover lambs, while the priests splattered the blood handed to them and the Levites skinned the animals. 12They set aside the burnt offerings to be given to the divisions of the families of the people to offer to the LORD, as it is written in the Book of Moses. And they did the same with the bulls.

13They roasted the Passover animals on the fire according to the regulation, and they boiled the other holy offerings in pots, kettles, and bowls and quickly brought them to all the people. 14Afterward, they made preparations for themselves and for the priests, since the priests, the descendants of Aaron, were offering up burnt offerings and fat until nightfall. So the Levites made preparations for themselves and for the priests, the descendants of Aaron.

15The singers, the descendants of Asaph, were at their stations according to the command of David, Asaph, Heman, and Jeduthun the king’s seer. And the gatekeepers at each gate did not need to leave their posts, because their fellow Levites made preparations for them.