2 Chronicles 35:13-14

They roasted the Pesach lamb over fire, according to the rule; while they boiled the holy offerings in pots, kettles and pans and carried them quickly to all the ordinary people.

Afterwards, they prepared food for themselves and for the cohanim; because the cohanim, the descendants of Aharon, were busy till nightfall offering the fat and the portions to be burned up; this is why the L'vi'im prepared food both for themselves and for the cohanim the descendants of Aharon.