Leviticus 6:24-27

24The Lord said to Moses,

25“Say to Aaron and his sons: ‘These are the regulations for the sin offering: The sin offering is to be slaughtered before the Lord in the place the burnt offering is slaughtered; it is most holy.

26The priest who offers it shall eat it; it is to be eaten in the sanctuary area, in the courtyard of the tent of meeting.

27Whatever touches any of the flesh will become holy, and if any of the blood is spattered on a garment, you must wash it in the sanctuary area.