Leviticus 24:7-9

New Revised Standard Version, Anglicised

⁷ You shall put pure frankincense with each row, to be a token offering for the bread, as an offering by fire to the Lord. ⁸ Every sabbath day Aaron shall set them in order before the Lord regularly as a commitment of the people of Israel, as a covenant for ever. ⁹ They shall be for Aaron and his descendants, who shall eat them in a holy place, for they are most holy portions for him from the offerings by fire to the Lord, a perpetual due.