Leviticus Chapter 21 NASB
Leviticus Chapter 22
26 Then the Lord spoke to Moses, saying, 27“When an ox or a sheep or a goat is born, it shall remain seven days with its mother, and from the eighth day on it shall be accepted as a sacrifice of an offering by fire to the Lord. 28 But, whether it is an ox or a sheep, you shall not kill both it and its young in one day. 29 When you sacrifice a sacrifice of thanksgiving to the Lord, you shall sacrifice it so that you may be accepted. 30 It shall be eaten on the same day, you shall leave none of it until morning; I am the Lord. 31 So you shall keep My commandments, and do them; I am the Lord.