Deuteronomy 15:19-23

19You must keep separate every firstborn male animal that is born from your cows, sheep or goats. They belong to the Lord your God. Do not make these firstborn animals do any work for you. Do not cut off the wool from your firstborn sheep.

20Each year, you and your family must take these animals to the place that the Lord your God will choose. Eat them there, at the Lord's special home.

21But if a firstborn animal is not perfect, you must not offer it as a sacrifice to the Lord your God. It must not be blind or have weak legs. It must not have anything wrong with it.

22You may eat animals like that at home. It is the same as if you are eating meat from deer. Anyone may eat it. That includes people who are clean and people who are unclean.

23But you must not eat the animal's blood. You must pour it on the ground like water.