Leviticus 7:16-18

16The gift to God may be for a promise. The gift may be because the person loves God. That person will not have to eat it all on the same day. He can eat some of it on the next day.

17On the third day, there may still be some meat that he has not eaten. If there is, he must burn it.

18If the person eats the meat on the third day, God will not accept the gift. The meat is not good. The person who eats it will not give God pleasure.