1 Chronicles 23:28 -

Because their office ; i.e. probably the office or position of all, including the younger Levites. The development and greater detail of their varied duties, as the working staff of the "sons of Aaron," are alluded to here; and how priests, Levites, and Nethinim ( 1 Chronicles 9:2 ) all now formally undertook the whole range and scope of their functions is suggested. The work of these assistants of the "sons of Aaron" is detailed in three or four items, so far as this verse goes. They are first generally for the sacred service of the house of the Lord . That sacred service is in the matter of the courts; of the chambers ; of the purifying of all holy things: and of the work, i.e. the performing of the sacred service of the house of God.