4 There were more chief men found among the sons of Eleazar than of the sons of Ithamar; so they were divided like this: of the sons of Eleazar there were sixteen heads according to their ancestral houses, and eight according to their ancestral houses among the sons of Ithamar.
1 Chronicles 24:4 Cross References - NHEB
Numbers 25:11-13
11 "Phinehas, the son of Eleazar, the son of Aaron the priest, has turned my wrath away from the children of Israel, in that he was jealous with my jealousy among them, so that I did not consume the children of Israel in my jealousy.
12 Therefore say, 'Look, I give to him my covenant of peace:
13 and it shall be to him, and to his descendants after him, the covenant of an everlasting priesthood; because he was jealous for his God, and made atonement for the children of Israel.'"
1 Chronicles 15:6-12
6 of the sons of Merari, Asaiah the chief, and his brothers two hundred twenty;
7 of the sons of Gershom, Joel the chief, and his brothers one hundred thirty;
8 of the sons of Elizaphan, Shemaiah the chief, and his brothers two hundred;
9 of the sons of Hebron, Eliel the chief, and his brothers eighty;
10 of the sons of Uzziel, Amminadab the chief, and his brothers one hundred twelve.
11 David called for Zadok and Abiathar the priests, and for the Levites, for Uriel, Asaiah, and Joel, Shemaiah, and Eliel, and Amminadab,
12 and said to them, "You are the heads of the ancestral houses of the Levites. Sanctify yourselves, both you and your brothers, that you may bring up the ark of the LORD, the God of Israel, to the place that I have prepared for it.
1 Chronicles 23:24
24 These were the sons of Levi after their fathers' houses, even the heads of ancestral houses of those who were counted individually, in the number of names by their polls, who do the work for the service of the house of the LORD, from twenty years old and upward.