Leviticus 14:13

And he shall kill the lamb in the place where they kill the sin offering and the burnt offering , in the place of the sanctuary . For the guilt offering , like the sin offering , belongs to the priest ; it is most holy .

He is to slaughter the lamb in the sanctuary area where the sin offering and the burnt offering are slaughtered. Like the sin offering, the guilt offering belongs to the priest; it is most holy.

And he shall slay the lamb in the place where he shall kill the sin offering and the burnt offering, in the holy place : for as the sin offering is the priest's, so is the trespass offering : it is most holy :