Moses
Exodus 29:12ESV·traditional attribution

and shall take part of the blood of the bull and put it on the horns of the altar with your finger, and the rest of the blood you shall pour out at the base of the altar.

Matthew Henry Presbyterian @wholebiblehenry

Here is, I. The law concerning the consecration of Aaron and his sons to the priest's office, which was to be done with a great deal of ceremony and solemnity, that they themselves might be duly affected with the greatness of the work to which they were called, and that the people also might learn to magnify the office and none might dare to invade it. 1.

Commenting on Exodus 29:1-37

John Gill Reformed Baptist @doctorgill

And thou shalt take the blood of the bullock,.... Being slain, and its blood received into a basin: and put it upon the horns of the altar with thy finger; not sprinkle it with hyssop, as was done in some cases, but put on with the finger dipped into the blood in the basin; as the horns of the altar were the place where the...

Keil & Delitzsch Lutheran @keilanddelitzsch

Exo 29:1-37 Consecration of Aaron and his Sons through the anointing of their persons and the offering of sacrifices, the directions for which form the subject of vv. 1-35. This can only be fully understood in connection with the sacrificial law contained in Lev 1-7. It will be more advisable therefore to defer the examination of this ceremony till we come to Lev 8, where the consecration itself is described.

Commenting on Exodus 29:1-37