Leviticus 3:4-6

New Revised Standard Version, Anglicised

⁴ the two kidneys with the fat that is on them at the loins, and the appendage of the liver, which he shall remove with the kidneys. ⁵ Then Aaron’s sons shall turn these into smoke on the altar, with the burnt-offering that is on the wood on the fire, as an offering by fire of pleasing odour to the Lord.

⁶ If your offering for a sacrifice of well-being to the Lord is from the flock, male or female, you shall offer one without blemish.