Moses
Leviticus 9:22BSB·traditional attribution

Aaron lifted up his hands toward the people and blessed them. And having made the sin offering, the burnt offering, and the peace offering, he stepped down.

John Calvin Reformed @genevareformer

22. And Aaron lifted up his hand toward the people This was a kind of application of the sacrifice, in order that the people might know that God was reconciled to them through the priest as their mediator and surety. The form of benediction See ante on Numbers 6:22-27, vol. 2, p. 245 et seq.

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 Moses and Aaron went into the tabernacle of the congregation,.... They went out of the court where the altar of burnt offering stood, and where Aaron had been offering the sacrifices; and they went into the holy place, where stood the altar of incense, the shewbread table, and the candlestick; and it is probable Moses went in with Aaron thither, to show him how...