Numbers 4:22

New Revised Standard Version Catholic Interconfessional

Take a census of the Gershonites also, by their ancestral houses and by their clans;

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

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

with Eliasaph son of Lael as head of the ancestral house of the Gershonites.

Then the Lord spoke to Moses, saying:

from thirty years old up to fifty years old you shall enroll them, all who qualify to do work in the tent of meeting.