Leviticus 7:4-6

Living Bible

⁴ the two kidneys and the loin fat, and the gall bladder—all shall be set aside for sacrificing. ⁵ The priests will burn them upon the altar as a guilt offering to the Lord. ⁶ Only males among the priests may then eat the carcass, and it must be eaten in a holy place, for this is a most holy sacrifice.