Moses
Exodus 29:11BSB·traditional attribution

And you shall slaughter the bull before the LORD at the entrance to the Tent of Meeting.

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 kill the bullock before the Lord,.... That is, Moses is ordered to do it, who now officiated as a priest, "pro tempore", Aaron and his sons not being yet completely invested with that office, or thoroughly consecrated to it; of which consecration this sacrifice was a part, and therefore could not with propriety be concerned in killing their own sacrifice; for that...

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