Afterward, 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.

2 Chronicles 35:13
They 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.

2 Chronicles 35:15
The 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 position, because their fellow Levites made preparations for them.

And afterward they made ready for themselves, and for the priests: because the priests the sons of Aaron were busied in offering of burnt offerings and the fat until night; therefore the Levites prepared for themselves, and for the priests the sons of Aaron.