1 Tawarikh 15:12

15:12 He told them: “You are the leaders of the Levites’ families. You and your relatives must consecrate yourselves and bring the ark of the Lord God of Israel up to the place I have prepared for it.

1 Tawarikh 23:24

23:24 These were the descendants of Levi according to their families, that is, the leaders of families as counted and individually listed who carried out assigned tasks in the Lord’s temple and were twenty years old and up. ¹ 

1 Tawarikh 24:31

24:31 Just like their relatives, the descendants of Aaron, they also cast lots before King David, Zadok, Ahimelech, the leaders of families, the priests, and the Levites. The families of the oldest son cast lots along with the those of the youngest. ² 

[23:24]  ¹ tn Heb “these were the sons of Levi according to the house of their fathers, heads of the fathers, according to their numberings, by number of names, according to their heads, doer[s] of the work for the service of the house of the Lord, from a son of twenty years and upwards.”

[24:31]  ² tn Heb “the fathers [i.e., families] of the head [i.e., oldest] just like his youngest brother.”