It was narrated from Ibn 'Abbas, from Maimunah, that:
the Prophet passed by a dead sheep that had been thrown aside. He said: Who does this belong to? They said: Maimunah. He said: Why did she not make use of its skin? They said: It is dead meat (i.e., it was not slaughtered properly). He said: Allah, the Mighty and Sublime, has only forbidden us to eat it.