Leviticus 22:28

New Century Version

But you must not kill the animal and its mother on the same day, either an ox or a sheep.

Cross References

Exodus 23:19

“You must bring the best of the firstfruits of your land to the Holy Tent of the Lord your God. “You must not cook a young goat in its mother’s milk.

Exodus 34:26

“Bring the best first crops that you harvest from your ground to the Tent of the Lord your God. “You must not cook a young goat in its mother’s milk.”

Deuteronomy 14:21

Do not eat anything you find that is already dead. You may give it to a foreigner living in your town, and he may eat it, or you may sell it to a foreigner. But you are holy people, who belong to the Lord your God. Do not cook a baby goat in its mother’s milk.