Numbers 3:2-4

New King James Version

² And these are the names of the sons of Aaron: Nadab, the ^(A)firstborn, and ^(B)Abihu, Eleazar, and Ithamar. ³ These are the names of the sons of Aaron, ^(C)the anointed priests, ^[a]whom he consecrated to minister as priests. ^4 (D)Nadab and Abihu had died before the Lord when they offered profane fire before the Lord in the Wilderness of Sinai; and they had no children. So Eleazar and Ithamar ministered as priests in the presence of Aaron their father.