Numbers 4:22

The English Standar Version

"Take a census of the sons of Gershon also, by their fathers' houses and by their clans.

See the chapter Copy

with Eliasaph, the son of Lael as chief of the fathers' house of the Gershonites.

To Gershon belonged the clan of the Libnites and the clan of the Shimeites; these were the clans of the Gershonites.

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

The LORD spoke to Moses, saying,

From thirty years old up to fifty years old, you shall list them, all who can come to do duty, to do service in the tent of meeting.