Leviticus 7:3-6

³And he shall offer of it all its fat; the rump, and the fat that covereth the inwards,

⁴And the two kidneys, and the fat that is on them, which is by the flanks, and the caul that is above the liver, with the kidneys, that shall he take away:

⁵And the priest shall burn them upon the altar for an offering made by fire to the LORD: it is a trespass-offering.

⁶Every male among the priests shall eat of it: it shall be eaten in the holy place: it is most holy.