Leviticus 7:4-6

⁴And the two kidneys, and the fat on them, which is by the top of the legs, and the fat joining the liver and the kidneys, he is to take away:

⁵They are to be burned by the priest on the altar for an offering made by fire to the Lord: it is an offering for wrongdoing.

⁶Every male among the priests may have it as food in a holy place: it is most holy.