The Sons of Aaron
These are the generations of Aaron and Moses at the time when the Lord spoke with Moses on Mount Sinai.
These are the names of the sons of Aaron: d Nadab the firstborn, and Abihu, Eleazar, and Ithamar.
These are the names of the sons of Aaron, e the anointed priests, f whom he ordained to serve as priests.
g But Nadab and Abihu died before the Lord when they offered unauthorized 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 Aaron their father.
English Standard Version (ESV) The Holy Bible, English Standard Version Copyright © 2001 by Crossway Bibles, a division of Good News Publishers.
Aaron took as his wife Elisheba, the daughter of Amminadab and the sister of Nahshon, and she bore him Nadab, Abihu, Eleazar, and Ithamar.
The Lord spoke to Moses, saying.
And you shall put them on Aaron your brother, and on his sons with him, and shall anoint them and ordain them and consecrate them, that they may serve me as priests.
But Nadab and Abihu died when they offered unauthorized fire before the Lord.
Leviticus 10:1 - 2
Now Nadab and Abihu, the sons of Aaron, each took his censer and put fire in it and laid incense on it and offered unauthorized fire before the Lord, which he had not commanded them.
1 Chronicles 24:2
But Nadab and Abihu died before their father and had no children, so Eleazar and Ithamar became the priests.