Leviticus 3:7

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

5 That it may be burned by Aaron's sons on the altar, on the burned offering which is on the wood on the fire: it is an offering made by fire of a sweet smell to the Lord.

6 And if what he gives for a peace-offering to the Lord is of the flock, let him give a male or female, without any mark on it.

7 If his offering is a lamb, then let it be placed before the Lord:

8 And he is to put his hand on the head of his offering and put it to death before the Tent of meeting; and Aaron's sons are to put some of its blood on and round the altar.

9 And of the peace-offering, let him give an offering made by fire to the Lord; the fat of it, all the fat tail, he is to take away near the backbone; and the fat covering the inside parts and all the fat on the inside parts,

10 And the two kidneys, with the fat on them, which is by the top part of the legs, and the fat joining the liver and the kidneys, he is to take away;