1 Chronicles 24:1-6

1The divisions of the sons of Aaron were these. The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar. 2But Nadab and Abihu died before their father and had no children, so Eleazar and Ithamar became the priests. 3With the help of Zadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, David organized them according to the appointed duties in their service. 4Since more chief men were found among the sons of Eleazar than among the sons of Ithamar, they organized them under sixteen heads of fathers’ houses of the sons of Eleazar, and eight of the sons of Ithamar. 5They divided them by lot, all alike, for there were sacred officers and officers of God among both the sons of Eleazar and the sons of Ithamar. 6And the scribe Shemaiah, the son of Nethanel, a Levite, recorded them in the presence of the king and the princes and Zadok the priest and Ahimelech the son of Abiathar and the heads of the fathers’ houses of the priests and of the Levites, one father’s house being chosen for Eleazar and one chosen for Ithamar.