1 Chronicles 24:1-3

International Standard Version

The Priestly Divisions

24 With respect to the descendants of Aaron, classes of service were organized for Nadab, Abihu, Eleazar, and Ithamar, the descendants of Aaron. ² But Nadab and Abihu died before their father did, leaving no sons, so Eleazar and Ithamar became priests. ³ Along with Zadok, one of Eleazar’s descendants, and Ahimelech, one of Ithamar’s descendants, David organized their service according to their assigned responsibilities.