Exodus 29:14

But the bull and its hide and its flesh and its refuse he burned in the fire outside the camp, just as Yahweh had commanded Moses.

‘Then the heifer shall be burned in his sight; its hide and its flesh and its blood, with its refuse, shall be burned.

‘And you shall take the bull for the sin offering, and it shall be burned in the appointed place of the house, outside the sanctuary.

“Behold, I am going to rebuke your seed, and I will spread refuse on your faces, the refuse of your feasts; and you will be taken away with it.

For the bodies of those animals whose blood is brought into the holy places by the high priest as an offering for sin, are burned outside the camp.