Leviticus 22:25-30

²⁵You shall not offer bread to your God, from the hand of a stranger, nor any other thing that he would give: because they are all corrupted, and defiled: you shall not receive them.

²⁶And the Lord spoke to Moses, saying:

²⁷When a bullock, or a sheep, or a goat, is brought forth, they shall be seven days under the udder of their dam: but the eighth day, and thenceforth, they may be offered to the Lord.

²⁸Whether it be a cow, or a sheep, they shall not be sacrificed the same day with their young ones.

²⁹If you immolate a victim for thanksgiving to the Lord, that he may be favourable,

³⁰You shall eat it the same day, there shall not any of it remain until the morning of the next day. I am the Lord.