Numbers 4:23-25

Amplified Bible, Classic Edition

²³ From thirty years old and up to fifty years old you shall number them, all who enter for service to do the work in the Tent of Meeting.

²⁴ This is the service of the families of the Gershonites, in serving and in bearing burdens [when on the march]:

²⁵ And they shall carry the curtains of the tabernacle, and the Tent of Meeting, its covering, and the covering of dolphin or porpoise skin that is on top of it, and the hanging or screen for the door of the Tent of Meeting,