ERV(i)
1 And the courses of the sons of Aaron [were these]. The sons of Aaron; Nadab and Abihu, Eleazar and Ithamar.
2 But Nadab and Abihu died before their father, and had no children: therefore Eleazar and Ithamar executed the priest office.
3 And David with Zadok of the sons of Eleazar, and Ahimelech of the sons of Ithamar, divided them according to their ordering in their service.