Leviticus 22:27-29

King James Version

²⁷ When a bullock, or a sheep, or a goat, is brought forth, then it shall be seven days under the dam; and from the eighth day and thenceforth it shall be accepted for an offering made by fire unto the Lord.

²⁸ And whether it be cow, or ewe, ye shall not kill it and her young both in one day.

²⁹ And when ye will offer a sacrifice of thanksgiving unto the Lord, offer it at your own will.