Leviticus 4:20, 31

Thus shall he do with the bull. As he did with the bull of the sin offering, so shall he do with this. And the priest shall make atonement for them, and they shall be forgiven.

And all its fat he shall remove, as the fat is removed from the peace offerings, and the priest shall burn it on the altar for a pleasing aroma to the LORD. And the priest shall make atonement for him, and he shall be forgiven.