Numbers 4:3-5

World English Bible

³ from thirty years old and upward even until fifty years old, all who enter into the service to do the work in the Tent of Meeting.

⁴ “This is the service of the sons of Kohath in the Tent of Meeting, regarding the most holy things. ⁵ When the camp moves forward, Aaron shall go in with his sons; and they shall take down the veil of the screen, cover the ark of the Testimony with it,