Leviticus 3:14-16

New Revised Standard Version Catholic Edition

¹⁴ You shall present as your offering from it, as an offering by fire to the Lord, the fat that covers the entrails, and all the fat that is around the entrails; ¹⁵ the two kidneys with the fat that is on them at the loins, and the appendage of the liver, which you shall remove with the kidneys. ¹⁶ Then the priest shall turn these into smoke on the altar as a food offering by fire for a pleasing odor.

All fat is the Lord’s.