Numbers 4:3-5

New American Standard Bible

³ from ^(A)thirty years old and upward, even to fifty years old, everyone who can enter the service of ministry to do work in the tent of meeting. ⁴ This is the work of the ^[a]descendants of Kohath in the tent of meeting, concerning the most holy things.

⁵ “When the camp sets out, Aaron and his sons shall go in and take down ^(B)the veil of the curtain, and cover the ^(C)ark of the testimony with it;