But Nadab and Abihu had died because they offered unauthorized fire in the Lord’s presence.
Aaron married Elisheba, daughter of Amminadab and sister of Nahshon. She gave birth to Nadab, Abihu, Eleazar, and Ithamar.
Nadab and Abihu died in the Lord’s presence because they offered unauthorized fire in his presence in the Desert of Sinai. They had no children. So only Eleazar and Ithamar served as priests during the lifetime of their father Aaron.