Numbers 4:38-40

New King James Version

³⁸ And those who were numbered of the sons of Gershon, by their families and by their fathers’ house, ³⁹ from thirty years old and above, even to fifty years old, everyone who entered the service for work in the tabernacle of meeting— ⁴⁰ those who were numbered by their families, by their fathers’ house, were two thousand six hundred and thirty.