Then David said, “No one should carry the Ark of God except the Levites, for Adonai has chosen them to carry the Ark of Adonai and to serve Him forever.”
They appointed the kohanim in their divisions and the Levites in their divisions over the service of God at Jerusalem, as it is written in the book of Moses.
Also from the sanctuary servants, whom David and his officials had given for the work of the Levites, 220 sanctuary servants, all of them designated by name.
Isn’t it enough that the God of Israel has set you apart from the community of Israel to bring you near to Him to do the work of the Tabernacle of Adonai and to stand before the community to minister to them?
Bring with you your brothers, the tribe of Levi, the tribe of your father, so that they may join you and assist you, both you and your sons with you, before the Tent of the Testimony.
and I am giving the Levites as a gift to Aaron and his sons from among Bnei-Yisrael, to do the work on behalf of Bnei-Yisrael in the Tent of Meeting, and to make atonement for them—so that there would be no plague among them for coming too close to the Sanctuary.”