Exodus 6:21-24

The sons of Izhar were Korah, Nepheg, and Zichri. And the sons of Uzziel were Mishael, Elzaphan, and Zithri. Aaron took to himself Elisheba, daughter of Amminadab, sister of Nahshon, as wife; and she bore him Nadab, Abihu, Eleazar, and Ithamar. And the sons of Korah were Assir, Elkanah, and Abiasaph. These are the families of the Korahites.