Numbers 4:3-5

English Standard Version

^3 (A)from thirty years old up to fifty years old, all who can come on duty, to do the work in the tent of meeting. ⁴ This is the service of the sons of Kohath in the tent of meeting: ^(B)the most holy things. ⁵ When the camp is to set out, Aaron and his sons shall go in and take down ^(C)the veil of the screen and cover ^(D)the ark of the testimony with it.