Leviticus 24:5-9

“You shall take fine flour and bake twelve loaves from it; two tenths of an ephah shall be in each loaf. And you shall set them in two piles, six in a pile, on the table of pure gold before the LORD. And you shall put pure frankincense on each pile, that it may go with the bread as a memorial portion as a food offering to the LORD. Every Sabbath day Aaron shall arrange it before the LORD regularly; it is from the people of Israel as a covenant forever. And it shall be for Aaron and his sons, and they shall eat it in a holy place, since it is for him a most holy portion out of the LORD’s food offerings, a perpetual due.”