Numbers:4:38-40
kjv@Numbers:4:38 @ And those that were numbered of the sons of Gershon, throughout their families, and by the house of their fathers,
kjv@Numbers:4:39 @ 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,
kjv@Numbers:4:40 @ Even those that were numbered of them, throughout their families, by the house of their fathers, were two thousand and six hundred and thirty.