1 Tawarikh 24:6

24:6 The scribe Shemaiah son of Nethanel, a Levite, wrote down their names before the king, the officials, Zadok the priest, Ahimelech son of Abiathar, and the leaders of the priestly and Levite families. One family was drawn by lot from Eleazar, and then the next from Ithamar. 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 

[24:6]  ¹ tn Heb “one house of a father was drawn by lot for Eleazar, and one [this assumes an emendation of אָחֻז (’akhuz) to אֶחָד (’ekhad, “one”)] was drawn by lot for Ithamar.”

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