Numbers 4:23-25

New International Version

²³ Count all the men from thirty to fifty years of age^(A) who come to serve in the work at the tent of meeting.

²⁴ “This is the service of the Gershonite clans in their carrying and their other work: ²⁵ They are to carry the curtains of the tabernacle,^(B) that is, the tent of meeting,^(C) its covering^(D) and its outer covering of durable leather, the curtains for the entrance to the tent of meeting,