They were appointed to stand beside Aaron’s descendants to serve in the Lord’s temple. They were appointed to be in charge of the courtyards and the temple rooms, to ensure that all the holy things were clean, and to serve in God’s temple.
They gave the families of Gershon’s descendants, who were in the tribe of Levi, two cities with pasturelands from half of the tribe of Manasseh: Golan in Bashan (a city of refuge for murderers) and Ashtaroth.