C. F. Keil and Franz Delitzsch on 2 Chronicles 35:5

2Ch 35:5 “Stand in the sanctuary for the divisions of the fathers'-houses of your brethren, the people of the nation, and indeed a part of a father's-house of the Levites;” i.e., Serve your brethren the laymen, according to their fathers'-houses, in the court of the temple, in such fashion that a division of the Levites shall fall to each father's-house of the laymen; cf. 2Ch 35:12. So Bertheau correctly; but he would erase the ו before הלקּת without sufficient reason. Older commentators have supplied the preposition ל before הלקּת: Stand, according to the divisions of the fathers'-houses, and according to the division of a father's-house of the Levites; which gives the same sense, but can hardly be justified grammatically.