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
All the duties of the Gershonites for carrying their load and for their work will be at the command of Aaron and his sons. You will assign to them the responsibility to carry their load.
28
This is the work of the Gershonite clans in the dwelling. Their responsibility will be under Ithamar son of Aaron the priest.
29
You will enroll the Merarites by their clans and their households.
30
You will enroll those from 30 to 50 years old, all who are eligible for service to do work in the meeting tent.
31
This is what they are responsible to carry as their work in the meeting tent: the frames of the meeting tent, its bars, pillars, and bases;