Numbers 4:37-39

Darby Translation

³⁷ These are they that were numbered of the families of the Kohathites, every one that served in the tent of meeting, whom Moses and Aaron numbered according to the commandment of Jehovah through Moses.

³⁸ And those that were numbered of the sons of Gershon, after their families, and according to their fathers' houses,

³⁹ from thirty years old and upward even to fifty years old, every one that entered into the labour, for service in the tent of meeting,