The “fathers of Israel” are the heads of families; the chief of the fathers” are the great patriarchal chiefs, the admitted heads of great houses or clans. They were now admitted to share in the judicial office which seems in David’s time to have been confined to the Levites 1 Chronicles 23:4.
For the judgment of the Lord, and for controversies - By the former are meant disputed cases concerning the performance of religious obligations. In “controversies” are included all the ordinary causes, whether criminal or civil.
When they returned to Jerusalem - Rather, “and they returned to Jerusalem,” a clause which if detached from the previous words and attached to 2 Chronicles 19:9, gives a satisfactory sense.