Leviticus 22:27-28 NIV

27 “When a calf, a lamb or a goat is born, it is to remain with its mother for seven days. From the eighth day on, it will be acceptable as a food offering presented to the LORD.

References for Leviticus 22:27

28 Do not slaughter a cow or a sheep and its young on the same day.

References for Leviticus 22:28