Numbers 3:15

3:15 “Number the Levites by their clans and their families; every male from a month old and upward you are to number.”

Numbers 3:20

3:20 The sons of Merari by their families were Mahli and Mushi. These are the families of the Levites by their clans.

Numbers 4:38

4:38 Those numbered from the Gershonites, by their families and by their clans,

Numbers 4:42

4:42 Those numbered from the families of the Merarites, by their families, by their clans,

Numbers 4:46

4:46 All who were numbered of the Levites, whom Moses, Aaron, and the leaders of Israel numbered by their families and by their clans,

Numbers 17:2-3

17:2 “Speak to the Israelites, and receive from them a staff from each tribe, one from every tribal leader, twelve staffs; you must write each man’s name on his staff. 17:3 You must write Aaron’s name on the staff of Levi; for one staff is for the head of every tribe.

Ezra 2:59

2:59 These are the ones that came up from Tel Melah, Tel Harsha, Kerub, Addon, and Immer (although they were unable to certify their family connection or their ancestry, as to whether they really were from Israel):