Midrash su Levitico 9:16

10) (Vayikra 9:16): "And he presented the burnt-offering and he offered it according to the ordinance": Just as a burnt-offering requires flaying and cutting into pieces, this, too, required it. Just as a burnt-offering is entirely burnt by the (altar) fire, so, this. Just as with a burnt-offering, he stands on the side of the altar and flings (the blood beneath the red line), here, too. Just as with a burnt-offering, if limbs are jetted from the altar (to the ground), they are returned to the wood pile, here, too.