Leviticus 22:27-29

New Revised Standard Version, Anglicised Catholic Edition

²⁷ When an ox or a sheep or a goat is born, it shall remain for seven days with its mother, and from the eighth day onwards it shall be acceptable as the Lord’s offering by fire. ²⁸ But you shall not slaughter, from the herd or the flock, an animal with its young on the same day. ²⁹ When you sacrifice a thanksgiving-offering to the Lord, you shall sacrifice it so that it may be acceptable in your behalf.