Numbers 4:1

1 And the LORD spake unto Moses and unto Aaron, saying,

2 Take the sum of the sons of Kohath from among the sons of Levi, after their families, by the house of their fathers,

3 From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.

4 This shall be the service of the sons of Kohath in the tabernacle of the congregation, about the most holy things:

5 And when the camp setteth forward, Aaron shall come, and his sons, and they shall take down the covering vail, and cover the ark of testimony with it:

6 And shall put thereon the covering of badgers' skins, and shall spread over it a cloth wholly of blue, and shall put in the staves thereof.

7 And upon the table of shewbread they shall spread a cloth of blue, and put thereon the dishes, and the spoons, and the bowls, and covers to cover withal: and the continual bread shall be thereon: