1 Chronicles 23:26
Therefore the descendants of Levi are no longer to carry the Tent or its service implements."
Numbers 4:5
When the camp is about to travel, Aaron and his sons are to come and take down the veil of the curtain and cover the Ark of the Testimony with it.
Numbers 7:9
But he gave none of them to the descendants of Kohath, because their responsibility was to carry the holy things on their shoulders.
Numbers 4:15
"When Aaron and his sons have finished covering the sanctuary and all the utensils of the sanctuary, and the camp is about to travel, then the descendants of Kohath are to come and carry them, but they are not to touch the most sacred objects, so they won't die. These are the duties of the descendants of Kohath at the Tent of Meeting."
Numbers 4:49
They were numbered under the supervision of Moses according to what the LORD had said. Each person was assigned a responsibility to carry out, just as the LORD had commanded Moses.
Deuteronomy 10:8
At that time the LORD set apart the tribe of Levi to carry the Ark of the Covenant of the LORD, to stand in the LORD's presence, to serve, and to bless his name until this day.