Numbers 4:4-6

Darby Translation

⁴ This shall be the service of the sons of Kohath in the tent of meeting: it is most holy.

⁵ And when the camp setteth forward, Aaron and his sons shall go in, and they shall take down the veil of separation and cover the ark of testimony with it;

⁶ and shall put thereon a covering of badgers' skin, and shall spread over it a cloth wholly of blue, and shall put its staves [to it].