Leviticus 19:6

Modern English Version

It shall be eaten the same day you offer it or on the next day, and if any remains until the third day, it shall be burned in the fire.

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And you shall let nothing of it remain until the morning, but that of it which remains until the morning you shall burn with fire.

When you offer a sacrifice of peace offerings to the Lord, you shall offer it so that you might be accepted.

If it is eaten at all on the third day, then it is contaminated. It shall not be accepted.