Then he gave orders: “Nobody is to carry the Ark of God except the Levites, for the Lord himself chose them to carry the Ark of the Lord and to serve him forever.”
Their assignment was to help the descendants of Aaron with the service of the house of the Lord They were responsible for the courtyards and rooms, for cleansing all the holy things, and the work of the service of the house of God.
So the Levites were to carry out the responsibility of caring for the Tent of Meeting and the sanctuary, and with their brothers the descendants of Aaron, they served the house of the Lord.
My sons, don't neglect your responsibilities, for the Lord has chosen you to stand in his presence to serve him, and to be his ministers presenting burnt offerings.”
The Tent of Meeting which stands at the center of the camp is to accompany the Levites. They are to march out in the same order as they set up camp, each in their rightful place under their flag.
At this time the Lord put the tribe of Levi in charge of carrying the Ark of the Lord's Agreement, as well as serving the Lord by standing in his presence, and of pronouncing blessings in his name, as they continue to do to this day.