It was narrated from Maimunah that he (meaning the Prophet P.B.U.H passed by a dead sheep belonging to the freed slave woman of Maimunah, that had been given to her in charity. He said: "Why don't they take its skin and tan it, and make use of it?" They said: "0 Messenger of Allah, it is dead meat." He said: "It is only unlawful to eat it." (Sahih)