Exodus 6:23-25

New International Version

²³ Aaron married Elisheba, daughter of Amminadab^(A) and sister of Nahshon,^(B) and she bore him Nadab and Abihu,^(C) Eleazar^(D) and Ithamar.^(E)

²⁴ The sons of Korah^(F) were Assir, Elkanah and Abiasaph. These were the Korahite clans.

²⁵ Eleazar son of Aaron married one of the daughters of Putiel, and she bore him Phinehas.^(G)

These were the heads of the Levite families, clan by clan.