Leviticus 3:4-9

4the two kidneys and the fat that is on them by the flanks, and the fatty lobe attached to the liver above the kidneys, he shall remove;

5and Aaron’s sons shall burn it on the altar upon the burnt sacrifice, which is on the wood that is on the fire, as an offering made by fire, a sweet aroma to the Lord.

6‘If his offering as a sacrifice of a peace offering to the Lord is of the flock, whether male or female, he shall offer it without blemish.

7If he offers a lamb as his offering, then he shall offer it before the Lord.

8And he shall lay his hand on the head of his offering, and kill it before the tabernacle of meeting; and Aaron’s sons shall sprinkle its blood all around on the altar.

9‘Then he shall offer from the sacrifice of the peace offering, as an offering made by fire to the Lord, its fat and the whole fat tail which he shall remove close to the backbone. And the fat that covers the entrails and all the fat that is on the entrails,