Leviticus 7:12-19

If he offers it for a thanksgiving, then he shall offer, with the sacrifice of thanksgiving, unleavened cakes mixed with oil, unleavened wafers anointed with oil, or cakes of blended flour mixed with oil. Besides the cakes, as his offering he shall offer leavened bread with the sacrifice of thanksgiving of his peace offering. And from it he shall offer one cake from each offering as a heave offering to the LORD. It shall belong to the priest who sprinkles the blood of the peace offering. ‘The flesh of the sacrifice of his peace offering for thanksgiving shall be eaten the same day it is offered. He shall not leave any of it until morning. But if the sacrifice of his offering is a vow or a voluntary offering, it shall be eaten the same day that he offers his sacrifice; but on the next day the remainder of it also may be eaten; the remainder of the flesh of the sacrifice on the third day must be burned with fire. And if any of the flesh of the sacrifice of his peace offering is eaten at all on the third day, it shall not be accepted, nor shall it be imputed to him; it shall be an abomination to him who offers it, and the person who eats of it shall bear guilt. ‘The flesh that touches any unclean thing shall not be eaten. It shall be burned with fire. And as for the clean flesh, all who are clean may eat of it.