Exodus 29:10-14

10“You are to bring the bull before the Tent of Meeting, and Aaron and his sons are to lay their hands on its head.

11You are to slaughter the bull before Adonai at the entrance of the Tent of Meeting.

12Then take the blood of the bull, put it on the horns of the altar with your finger, and pour out all the remaining blood at the base of the altar.

13Also take all the fat that covers the innards, the lobe above the liver, the two kidneys, along with the fat that is on them, and burn them on the altar.

14But the meat of the bull, along with its skin and its dung, you are to burn with fire outside the camp. It is a sin offering.