Leviticus 7:1-6

1 Likewise this shall be the law of the expiation of guilt; it shall be most holy.
2 In the place where they kill the burnt offering shall they kill the expiation of guilt, and he shall sprinkle its blood round about upon the altar.
3 And he shall offer of it all the fat thereof, the tail and the fat that covers the intestines
4 and the two kidneys and the fat that is on them and that which is on the flanks and with the kidneys he shall take away the caul that is above the liver.
5 And the priest shall incense them upon the altar for an offering on fire unto the LORD; and this shall be the expiation of guilt.
6 Every male among the priests shall eat thereof; it shall be eaten in the holy place for it is most holy.