Yahya related to me from Malik from Nafi from a man of the Ansar
from Muadh ibn Sad or Sad ibn Muadh that a slave-girl of Kab ibn Malik
was herding some sheep at Sal (a mountain near Madina). One of the
sheep was about to die, so she went over to it and slaughtered it with
a stone. The Messenger of Allah, may Allah bless him and grant him
peace, was asked about that, and he said, "There is no harm in it, so
eat it."
Muwatta Malik Book 24, Hadith 4