Moses
Leviticus 16:18BSB·traditional attribution

Then he shall go out to the altar that is before the LORD and make atonement for it. He is to take some of the bull’s blood and some of the goat’s blood and put it on all the horns of the altar.

Matthew Henry Presbyterian @wholebiblehenry

When the priest had come out from the sprinkling the blood of the bullock before the mercy-seat, 1. He must next kill the goat which was the sin-offering for the people (Lev 16:15) and go the third time into the holy of holies, to sprinkle the blood of the goat, as he had done that of the bullock; and thus he was to make atonement...

Commenting on Leviticus 16:15-19

John Gill Reformed Baptist @doctorgill

And he shall go out unto the altar that is before the Lord,.... The golden altar, the altar of incense, which stood in the holy place without the vail, over against the most holy place, where Jehovah dwelt, and so is said to be before him; of this altar the Misnah (r) understands it, and so do Jarchi and Ben Gersom; and, according to Exo...

Geneva Bible Notes Reformed @genevanotes

And he shall go out unto the altar that [is] before the LORD, and make an atonement for it; and shall take of the blood of the bullock, and of the blood of the goat, and put [it] upon the horns of the altar round about. (f) Upon which the sweet incense and perfume was offered.