Leviticus 6:24-27

24And the LORD said to Moses, 25“Tell Aaron and his sons that this is the law of the sin offering: In the place where the burnt offering is slaughtered, the sin offering shall be slaughtered before the LORD; it is most holy. 26The priest who offers it shall eat it; it must be eaten in a holy place, in the courtyard of the Tent of Meeting. 27Anything that touches its flesh will become holy, and if any of the blood is spattered on a garment, you must wash it in a holy place.