Numbers 4:4–6

4 This is the service of the sons of Kohath in the tent of meeting: the most holy things. 5 When the camp is to set out, Aaron and his sons shall go in and take down the veil of the screen, and cover the ark of the testimony with it; 6 then they shall put on it a covering of goatskin, and spread over that a cloth all of blue, and shall put in its poles.