Moses
Leviticus 3:2BSB·traditional attribution

He is to lay his hand on the head of the offering and slaughter it at the entrance to the Tent of Meeting. Then Aaron’s sons the priests shall splatter the blood on all sides of the altar.

Matthew Henry Presbyterian @wholebiblehenry

The burnt-offerings had regard to God as in himself the best of beings, most perfect and excellent; they were purely expressive of adoration, and therefore were wholly burnt. But the peace-offerings had regard to God as a benefactor to his creatures, and the giver of all good things to us; and therefore these were divided between the altar, the priest, and the owner. Peace signifies, 1. Reconciliation, concord, and communion.

Commenting on Leviticus 3:1-5

John Gill Reformed Baptist @doctorgill

And he shall lay his hand upon the head of his offering,.... "His right hand with strength", the Targum of Jonathan says; perhaps both his hands were imposed; the Septuagint and Arabic versions read it in the plural number, "hands"; this same rite was used in the sacrifice of burnt offering; see Gill on Lev 1:4; which might be done in any place in the...

Jamieson-Fausset-Brown Reformed @jfbcommentary

he shall lay his hand upon the head of his offering--Having performed this significant act, he killed it before the door of the tabernacle, and the priests sprinkled the blood round about upon the altar.