Leviticus 7:3-5

The Voice

³ Then the priest is to offer all of its fat, the fat tail, the fat covering and surrounding the organs, ⁴ the two kidneys and the fat on them near the loins, and the lobe of the liver (which he is to remove along with the kidneys). ⁵ The priest must offer it all up on the altar as a fire-offering to Me. It is a guilt offering.