Numbers 26:57-62

57Now these were the Levites numbered by their clans:

The Gershonite clan from Gershon, the Kohathite clan from Kohath, and the Merarite clan from Merari.

58These were the families of the Levites:

The Libnite clan, the Hebronite clan, the Mahlite clan, the Mushite clan, and the Korahite clan.

Now Kohath was the father of Amram, 59and Amram’s wife was named Jochebed. She was also a daughter of Levi, born to Levi in Egypt. To Amram she bore Aaron, Moses, and their sister Miriam. 60Nadab, Abihu, Eleazar, and Ithamar were born to Aaron, 61but Nadab and Abihu died when they offered unauthorized1 fire before the LORD.

62The registration of the Levites totaled 23,000, every male a month old or more; they were not numbered among the other Israelites, because no inheritance was given to them among the Israelites.