and these are the names of the sons of Aaron: Nadab the eldest son, and Abihu; Eleazar and Ithamar.

but Nadab and Abihu died before the LORD, as they brought strange fire before the LORD in the wilderness of Sinai, and had no children. And Eleazar and Ithamar ministered in the sight of Aaron their father.

And this is the service of the kindred of the children of the Gershonites in the tabernacle of witness, and their wait shall be in the hand of Ithamar the son of Aaron the priest.

This is the service of the kindreds of the sons of Merari in all their service in the tabernacle of witness by the hand of Ithamar the son of Aaron the priest."

And four chariots and eight oxen he gave unto the sons of Merari according unto their offices, under the hands of Ithamar the son of Aaron the priest.

And unto Aaron were born, Nadab, Abihu, Eleazar and Ithamar.