Moses
Leviticus 9:9ESV·traditional attribution

And the sons of Aaron presented the blood to him, and he dipped his finger in the blood and put it on the horns of the altar and poured out the blood at the base of the altar.

Matthew Henry Presbyterian @wholebiblehenry

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

John Gill Reformed Baptist @doctorgill

And the sons of Aaron brought the blood unto him,.... The blood of the calf of the sin offering, which they had received in a basin when it was slain: and he dipped his finger in the blood, and put it upon the horns of the altar; the four horns of it, as Moses had done at his consecration, which was an example to him, Lev 8:15.

Keil & Delitzsch Lutheran @keilanddelitzsch

Lev 9:8-11 Accordingly, he offered first of all the sin-offering and burnt-offering for himself, and then (Lev 9:15-21) the offerings of the people. The sin-offering always went first, because it served to remove the estrangement of man from the holy God arising from sin, by means of the expiation of the sinner, and to clear away the hindrances to his approach to God.

Commenting on Leviticus 9:8-11