Numbers 4:2-4

Darby Translation

² Take the sum of the sons of Kohath from among the sons of Levi, after their families, according to their fathers' houses,

³ from thirty years old and upward even unto fifty years old, all that enter into the service, to do the work in the tent of meeting.

⁴ This shall be the service of the sons of Kohath in the tent of meeting: it is most holy.