Numbers 26:57-62

57And these are the Levites who were numbered according to their families: from Gershon, the family of the Gershonites; of Kohath, the family of the Kohathites; from Merari, the family of the Merarites.

58These are the families of the Levites: the family of the Libnites, the family of the Hebronites, the family of the Mahlites, the family of the Mushites, the family of the Korahites. Kohath became the father of Amram.

59Now the name of Amram’s wife was Jochebed, daughter of Levi, who was born to Levi in Egypt. And to Amram she bore Aaron, Moses, and Miriam their sister.

60And to Aaron were born Nadab and Abihu, Eleazar and Ithamar.

61But Nadab and Abihu died when they offered strange fire before the Lord.

62Those of them who were numbered were 23,000, all males from a month old and upward, for they were not numbered among the Israelites; no inheritance was given to them among the Israelites.