Mishkat al-Masabih

Abu Sa'id al-Khudri told th at they said, “Messenger of God, we cut the throat of a she-camel and slaughter a cow and a sheep and find an embryo in its womb. Shall we throw it away or eat it?” He replied, “Eat it if you wish, for its slaughter is included when its mother is slaughtered.” Abu Dawud and Ibn Majah transmitted it.