Leviticus 22:26-28

New Revised Standard Version, Anglicised Catholic Edition

²⁶ The Lord spoke to Moses, saying: 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.