Leviticus 24:5-9

24:5 “You must take choice wheat flour and bake twelve loaves; there must be two tenths of an ephah of flour in each loaf, 24:6 and you must set them in two rows, six in a row, on the ceremonially pure table before the Lord. 24:7 You must put pure frankincense on each row, and it will become a memorial portion for the bread, a gift to the Lord. 24:8 Each Sabbath day Aaron must arrange it before the Lord continually; this portion is from the Israelites as a perpetual covenant. 24:9 It will belong to Aaron and his sons, and they must eat it in a holy place because it is most holy to him, a perpetual allotted portion from the gifts of the Lord.”