Numbers 3:14-20

14The LORD said to Moses in the Desert of Sinai, 15“Count the Levites by their families and clans. Count every male a month old or more.”

16So Moses counted them, as he was commanded by the word of the LORD .

17These were the names of the sons of Levi: Gershon, Kohath and Merari.

18These were the names of the Gershonite clans: Libni and Shimei.

19The Kohathite clans: Amram, Izhar, Hebron and Uzziel.

20The Merarite clans: Mahli and Mushi. These were the Levite clans, according to their families.