and enrolled genealogically the priests by the house of their fathers, and of the Levites from a son of twenty years and upward, and their duties, and their divisions;
These were those numbered of the families of Gershon, everyone who is serving in the tabernacle of the congregation, whom Moses and Aaron numbered at the mouth of Jehovah.
from a son of thirty years and upward, even to a son of fifty years, everyone who is going into the service, for work in the tabernacle of the congregation,