“Once I was with abu ‘Abd Allah (a.s.), when Muhammad ibn ‘Abd al-Salam came. I said, ‘I pray to Allah to keep my soul in service for your cause. My grandfather asks you about the case of a man who has hit a cow with a hammer and it has fallen down, then he has slaughtered it.’ He (the Imam) did not send the answer but he (the Imam) called Sa‘idah, a slave-girl of ‘Umm Farwah and said to her, ‘Muhammad came to me with a letter from you but I disliked to send the answer with him. In the case of the man who has slaughtered the cow, when slaughtering if blood has come out normally you can use it for food and feed, but if its coming is heavy, then do not go close to it.’”