Leviticus 22:30

It is to be eaten that same day. You are not to leave any of it until morning. I am the LORD.

Then Moses told them, "No one is to leave any of it until morning."

As to the meat contained in his peace offerings, it is to be eaten on the day it is offered. Nothing of it is to remain until morning."

If it is eaten on the third day, it's unclean. It won't be accepted.

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