He washed the entrails and the legs and burned them atop the burnt offering on the altar.
These being the first offerings that ever were offered by the levitical priesthood, according to the newly-enacted law of sacrifices, the manner of offering them is particularly related, that it might appear how exactly they agreed with the institution. 1.
Commenting on Leviticus 9:8-22
And he brought the people's offering,.... To the altar, having offered his own first: and took the goat, which was the sin offering for the people, and slew it; where he had slain his own: and offered it for sin, as the first: the first offering he offered for himself, which was of the same sort.
And he did wash the inwards and the legs, and burnt [them] upon the burnt offering on the altar. (f) All this must be understood of the preparation of the sacrifices which were burnt after, .