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.
The destruction which Josiah made of idols and idolatry was more largely related in the Kings, but just mentioned here in the foregoing chapter (v. 33); but his solemnizing the passover, which was touched upon there (Kg2 23:21), is very particularly related here. Many were the feasts of the Lord, appointed by the ceremonial law, but the passover was the chief.
Commenting on 2 Chronicles 35:1-19
And afterwards they made ready for themselves, and for the priests,.... The passover lambs, and such parts of the peace offerings that belonged to them: because the priests the sons of Aaron were busied in offering burnt offerings; such as are before said to be removed or separated for that purpose: and the fat; of the peace offerings that was to be burnt: and this...
afterwards they made ready for themselves, and for the priests--The Levites rendered this aid to the priests solely because they were so engrossed the entire day that they had no leisure to provide any refreshments for themselves.