Numbers 3:14-20

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

15“Number the children of Levi by their fathers’ houses, by their families; you shall number every male from a month old and above.”

16So Moses numbered them according to the word of the Lord, as he was commanded.

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

18And these are the names of the sons of Gershon by their families: Libni and Shimei.

19And the sons of Kohath by their families: Amram, Izehar, Hebron, and Uzziel.

20And the sons of Merari by their families: Mahli and Mushi. These are the families of the Levites by their fathers’ houses.