Numbers 4:27-29

Revised Standard Version

²⁷ All the service of the sons of the Gershonites shall be at the command of Aaron and his sons, in all that they are to carry, and in all that they have to do; and you shall assign to their charge all that they are to carry. ²⁸ This is the service of the families of the sons of the Gershonites in the tent of meeting, and their work is to be under the oversight of Ith′amar the son of Aaron the priest.

²⁹ “As for the sons of Merar′i, you shall number them by their families and their fathers’ houses;