Abdullah bin Umar (may Allah be pleased with them both) narrates that the Prophet Muhammad (peace be upon him) said: "Slaughtering the mother of an animal that has a fetus in its womb will be considered as slaughtering the fetus as well, whether its hair has appeared or not." The narrator named Ubaidullah stated this: But if it comes out of the mother's womb, then it should be slaughtered, so that blood flows from its belly as well.