Leviticus 7:4-6

New Revised Standard Version, Anglicised Catholic Edition

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