“Whether it is a cow or ewe, you shall not kill it and its young both in one day.”
Leviticus 22:28 (WEB)
Context Reading
26Yahweh spoke to Moses, saying, 27“When a bull, a sheep, or a goat is born, it shall remain seven days with its mother. From the eighth day on it shall be accepted for the offering of an offering made by fire to Yahweh. 28Whether it is a cow or ewe, you shall not kill it and its young both in one day. 29“When you sacrifice a sacrifice of thanksgiving to Yahweh, you shall sacrifice it so that you may be accepted. 30It shall be eaten on the same day; you shall leave none of it until the morning. I am Yahweh.