Leviticus 6:25-26

6:25 “Tell Aaron and his sons, ‘This is the law of the sin offering. In the place where the burnt offering is slaughtered the sin offering must be slaughtered before the Lord. It is most holy. 6:26 The priest who offers it for sin is to eat it. It must be eaten in a holy place, in the court of the Meeting Tent.

Leviticus 14:13

14:13 He must then slaughter the male lamb in the place where the sin offering and the burnt offering are slaughtered, in the sanctuary, because, like the sin offering, the guilt offering belongs to the priest; it is most holy.