Leviticus 7:4-6

Revised Standard Version

⁴ the two kidneys with the fat that is on them at the loins, and the appendage of the liver which he shall take away with the kidneys; ⁵ the priest shall burn them on the altar as an offering by fire to the Lord; it is a guilt offering. ⁶ Every male among the priests may eat of it; it shall be eaten in a holy place; it is most holy.