a wolf bit a sheep so he slaughtered it with Marwah, and the Prophet allowed him to eat it.
Sunan an-Nasa'i Book 43, Hadith 40
← Previous Hadith he caught two rabbits and he could not find a knife with which to slaughter then, so he slaughtered them with Marwah. Then he came to the Prophet and said: "O Mesenger of Allah! I caught two rabbits but I could not find a knife with which to slaughter them, so I slaughtered them with Marwah;l can I eat them?" He said: "Eat (them)."

Sunan an-Nasa'i Book 43, Hadith 39 Next Hadith → "I said: 'O Messenger of Allah, I release my dog and I catch the game, but I cannot find anything to slaughter it with, so I slaughter it with a Marwah or a stick,; He said: 'Shed the blood with whatever you wish, and say the name of Allah."'

Sunan an-Nasa'i Book 43, Hadith 41