Numbers 4:39 in the King James Version
From thirty years old and upward even unto fifty years old, every one that entereth into the service, for the work in the tabernacle of the congregation,
Context
38 Those who were counted of the sons of Gershon, by their families, and by their fathers’ houses,
39 from thirty years old and upward even to fifty years old—everyone who entered into the service for work in the Tent of Meeting,
40 even those who were counted of them, by their families, by their fathers’ houses, were two thousand six hundred thirty.