Leviticus 24:7-9

King James Version

⁷ And thou shalt put pure frankincense upon each row, that it may be on the bread for a memorial, even an offering made by fire unto the Lord.

⁸ Every sabbath he shall set it in order before the Lord continually, being taken from the children of Israel by an everlasting covenant.

⁹ And it shall be Aaron's and his sons'; and they shall eat it in the holy place: for it is most holy unto him of the offerings of the Lord made by fire by a perpetual statute.