These then are the names of the sons of Aaron: Nadab the firstborn, and Abihu, Eleazar and Ithamar.

But Nadab and Abihu died before the Lord when they offered strange fire before the Lord in the wilderness of Sinai; and they had no children. So Eleazar and Ithamar served as priests in the lifetime of their father Aaron.

This is the service of the families of the sons of the Gershonites in the tent of meeting, and their duties shall be under the direction of Ithamar the son of Aaron the priest.

This is the service of the families of the sons of Merari, according to all their service in the tent of meeting, under the direction of Ithamar the son of Aaron the priest.”

and four carts and eight oxen he gave to the sons of Merari, according to their service, under the direction of Ithamar the son of Aaron the priest.

To Aaron were born Nadab and Abihu, Eleazar and Ithamar.