Exodus 6:23 (KJV)
And Aaron took him Elisheba, daughter of Amminadab, sister of Naashon, to wife; and she bore him Nadab, and Abihu, Eleazar, and Ithamar.
And Aaron took him Elisheba, daughter of Amminadab, sister of Naashon, to wife; and she bore him Nadab, and Abihu, Eleazar, and Ithamar.