Numbers 4:5-6

5When the people are ready to move, Aaron and his sons must go into the Tent of Meeting. They must take down the curtain that is in front of the Covenant Box. They must cover the Covenant Box with the curtain.

6Then they must cover the curtain with good leather. On the top of that, they must put a blue cloth. Then, they must put the poles through the rings, so that they can carry the Covenant Box.