Numbers 4:23-25

New International Version - UK

²³ Count all the men from thirty to fifty years of age 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, that is, the tent of meeting, its covering and its outer covering of durable leather, the curtains for the entrance to the tent of meeting,