Leviticus 7:16-18

16“But if the sacrifice of his offering is a vow or a freewill offering, it is to be eaten on the day that he offers his sacrifice. On the next day what remains of it may be eaten.

17But what remains of the meat of the sacrifice on the third day is to be burned up with fire.

18If any of the meat of the sacrifice of his fellowship offerings is eaten on the third day, it will not be accepted, nor will it be credited to him who offers it. It will be a foul thing—and the soul who eats any from it will bear his own iniquity.