“Take a census of the sons of Gershon also, by their fathers’ households, by their families;
And these are the names of the sons of Gershon by their families: Libni and Shimei;
Of Gershon was the family of the Libnites and the family of the Shimeites; these were the families of the Gershonites.
and the leader of the fathers’ households of the Gershonites: Eliasaph the son of Lael.
Then the Lord spoke to Moses, saying,
from thirty years old and upward to fifty years old you shall count them: all who can enter to perform service, to do the work in the tent of meeting.