Numbers 4:48

⁴⁶All that were numbered, whom Moses and Aaron and the rulers of Israel numbered, namely, the Levites, according to their families and according to the houses of their lineage,

⁴⁷from five and twenty years old and upward till fifty years old, everyone that goes in to the service of the works, and the charge of the things that are carried in the tabernacle of witness.

— Numbers 4:48 —

⁴⁹He reviewed them by the word of the Lord by the hand of Moses, appointing each man severally over their respective work, and over their burdens; and they were numbered, as the Lord commanded Moses.