As for the sons of Merari The third and youngest son of Levi:
thou shalt number them after their families, by the house of their fathers; which is the form of expression used of them all; (See Gill on Numbers 4:2).
27
Aaron and his sons shall assign all the service of the sons of the Gershonites, all their tasks and all their service. And you shall appoint to them all their tasks as their duty.
28
This is the service of the families of the sons of Gershon in the tabernacle of meeting. And their duties shall be under the authority of Ithamar the son of Aaron the priest.
29
"As for the sons of Merari, you shall number them by their families and by their fathers' house.
30
From thirty years old and above, even to fifty years old, you shall number them, everyone who enters the service to do the work of the tabernacle of meeting.
31
And this is what they must carry as all their service for the tabernacle of meeting: the boards of the tabernacle, its bars, its pillars, its sockets,