So the service was prepared, and the priests stood in their place, and the Levites in their courses, according to the king's commandment.

Jamieson-Fausset-Brown Bible Commentary

10, 11. So the service was prepared, &c.-All the necessary preparations having been completed, and the appointed time having arrived for the passover, the solemnity was celebrated. One remarkable feature in the account is the prominent part that was taken by the Levites in the preparation of the sacrifices; namely, the killing and stripping of the skins, which were properly the peculiar duties of the priests; but as those functionaries were not able to overtake the extraordinary amount of work and the Levites had been duly sanctified for the service, they were enlisted for the time in this priestly employment. At the passover in Hezekiah's time, the Levites officiated in the same departments of duty, the reason assigned for that deviation from the established rule being the unprepared state of many of the people (2Ch 30:17). But on this occasion the whole people had been duly sanctified, and therefore the exceptional enlistment of the Levites' services must have been rendered unavoidably necessary from the multitudes engaged in celebrating the passover.

Matthew Henry's Concise Commentary

35:1-19 The destruction Josiah made of idolatry, was more largely related in the book of Kings. His solemnizing the passover is related here. The Lord's supper resembles the passover more than any other of the Jewish festivals; and the due observance of that ordinance, is a proof of growing piety and devotion. God alone can truly make our hearts holy, and prepare them for his holy services; but there are duties belonging to us, in doing which we obtain this blessing from the Lord.