Numbers 3:30

3:30 Now the leader of the clan of the families of the Kohathites was Elizaphan son of Uzziel.

Numbers 4:18

4:18 “Do not allow the tribe of the families of the Kohathites to be cut off ¹  from among the Levites;

Numbers 4:34

Summary

4:34 So Moses and Aaron and the leaders of the community numbered the Kohathites by their families and by clans,

Numbers 3:27

The Numbering of the Kohathites

3:27 From Kohath came the family of the Amramites, the family of the Izharites, the family of the Hebronites, and the family of the Uzzielites; these were the families of the Kohathites. ² 

Numbers 4:37

4:37 These were those numbered from the families of the Kohathites, everyone who served in the tent of meeting, whom Moses and Aaron numbered according to the word of the Lord by the authority of Moses.

Numbers 26:57

26:57 And these are the Levites who were numbered according to their families: from Gershon, the family of the Gershonites; of Kohath, the family of the Kohathites; from Merari, the family of the Merarites.

¹ sn The verb is simply the Qal, “do not cut off.” The context calls for a permissive nuance – “do not let them be cut off.” It was a difficult task to be handling the holy things correctly; Moses and Aaron were to see to it that they did it right and did not handle the objects, that is, Moses and Aaron were to safeguard their lives by making certain that proper procedures were followed.

¹ sn Both Moses and Aaron came from this line (6:16-20). During the Hebrew monarchy this branch of the line of Levi was exemplary in music (1 Chr 6:33-48). They were also helpful to Hezekiah in his reforms (1 Chr 29:12-14).