Leviticus 6:17; Leviticus 6:25

17 'It shall not be baked with leaven. I have given it as their share from My offerings by fire; it is most holy, like the sin offering and the guilt offering.

25 "Speak to Aaron and to his sons, saying, 'This is the law of the sin offering: in the place where the burnt offering is slain the sin offering shall be slain before the LORD ; it is most holy.