I Chronicles 24:4, 31

There were more leaders found of the sons of Eleazar than of the sons of Ithamar, and thus they were divided. Among the sons of Eleazar were sixteen heads of their fathers’ houses, and eight heads of their fathers’ houses among the sons of Ithamar.

These also cast lots just as their brothers the sons of Aaron did, in the presence of King David, Zadok, Ahimelech, and the heads of the fathers’ houses of the priests and Levites. The chief fathers did just as their younger brethren.