And Aaron took Elisheba, daughter of Amminadab and sister of Nahshon, to wife: which bare him Nadab, Abihu, Eleazar and Ithamar.

And take thou unto thee, Aaron thy brother, and his sons with him, from among the children of Israel, that he may minister unto me: both Aaron, Nadab, Abihu, Eleazar and Ithamar, Aaron's sons.

This is the sum of the habitation of witness, which was counted at the commandment of Moses: and was the office of the Levites by the hand of Ithamar son to Aaron the priest.