Leviticus 24:5-9

5“Then you shall take fine flour and bake twelve cakes (bread of the Presence, showbread) with it; two-tenths of an ephah shall be in each cake (loaf).

6You shall set the bread of the Presence (showbread) in two rows, six in a row, on the pure gold table before the Lord.

7You shall put pure frankincense [in two censers, one] beside each row, so that it may be with the bread as a memorial portion, an offering by fire to the Lord.

8Every Sabbath day Aaron shall arrange the showbread before the Lord continually; it is an everlasting covenant for the Israelites.

9The bread of the Presence shall be for Aaron and his sons, and they shall eat it in a sacred place, for it is for Aaron a most holy portion of the offerings by fire to the Lord, his portion forever.”