Numbers 4:7

And upon the table of showbread they shall spread a cloth of blue, as in the case of the ark, to distinguish it in a similar manner, and put thereon the dishes, the large bowls, and the spoons, and the bowls, the jugs or cans for the drink-offerings, and covers to cover withal, the small saucer-like dishes for pouring the drink-offering; and the continual bread shall be thereon, for so the show-bread was called because it was always before the face of the Lord;