Numbers 4:3-7

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.

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

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:

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.

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: