Sunan An-Nasa'i
Hadith #4236
Ibn'Abbas said:""The Messenger of Allah saw a dead sheep that belonged to the freed slave woman of Maimunah, and had come from the Sadaqah."" He said: ""Why don't you take off its hide and make use of it?"" They said: ""It is dead meat."" He said: ""It is only unlawful to eat it