Leviticus 24:5-9

5“You must take choice wheat flour and bake twelve loaves; there must be two tenths of an ephah of flour in each loaf,

6and you must set them in two rows, six in a row, on the ceremonially pure table before the Lord.

7You must put pure frankincense on each row, and it will become a memorial portion for the bread, a gift to the Lord.

8Each Sabbath day Aaron must arrange it before the Lord continually; this portion is from the Israelites as a perpetual covenant.

9It 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.”