Numbers 4:7, 9

“On the table of showbread they shall spread a blue cloth, and put on it the dishes, the pans, the bowls, and the pitchers for pouring; and the showbread shall be on it.

And they shall take a blue cloth and cover the lampstand of the light, with its lamps, its wick-trimmers, its trays, and all its oil vessels, with which they service it.