Numbers 4:4-15a

S This is the work of the Kohathites in the Tent of Meeting: the care of the most holy things. When the camp is to move, Aaron and his sons are to go in and take down the shielding curtain and cover the ark of the Testimony with it. Then they are to cover this with hides of sea cows, spread a cloth of solid blue over that and put the poles in place.