EJ2000(i)
1 ¶ The sons of Aaron also had their courses. The sons of Aaron: Nadab, Abihu, Eleazar, and Ithamar.
2 But Nadab and Abihu died before their father and had no children; therefore, Eleazar and Ithamar had the priesthood.
3 And David distributed them, Zadok being of the sons of Eleazar, and Ahimelech of the sons of Ithamar, according to their turns in their ministry.