Numbers 3:14-20

14Then the Lord spoke to Moses in the Wilderness of Sinai, saying,

15“Number the sons of Levi by their fathers’ households, by their families (clans). You shall number every male from a month old and upward.”

16So Moses numbered them just as he was commanded by the word (mouth) of the Lord.

17These are the [three] sons of Levi by their names: Gershon, Kohath, and Merari.

18These are the names of the [two] sons of Gershon by their families: Libni and Shimei;

19and the [four] sons of Kohath by their families: Amram, Izhar, Hebron, and Uzziel;

20and the [two] sons of Merari by their families: Mahli and Mushi. These are the families of the Levites by their fathers’ households.