Leviticus 3:7-9

New Revised Standard Version, Anglicised Catholic Edition

⁷ If you present a sheep as your offering, you shall bring it before the Lord ⁸ and lay your hand on the head of the offering. It shall be slaughtered before the tent of meeting, and Aaron’s sons shall dash its blood against all sides of the altar. ⁹ You shall present its fat from the sacrifice of well-being, as an offering by fire to the Lord: the whole broad tail, which shall be removed close to the backbone, the fat that covers the entrails, and all the fat that is around the entrails;