"If the blood is shed and the name of Allah is mentioned, then eat, unless (it is slaughtered) with teeth or nails."
Sunan an-Nasa'i Book 43, Hadith 43
← Previous Hadith "A man form among the Ansar had a she-camel which used to graze in front of Uhud. Something happened to it, and he slaughtered it with a stake,"- (Ayyub, one of the narrators, said) I said to Zaid:' A stake of wood or of iron?" He said "No of wood."- "Then he went to the Prophet and asked him, and he told him to eat it." (Sahih )

Sunan an-Nasa'i Book 43, Hadith 42 Next Hadith → "I said: 'O Messenger of Allah we are going to meet the enemy tomorrow and we do not have any knives.' The Messenger of Allah said: "If the blood is shed and the name of Allah is mentioned, then eat, unless (it is slaughtered (with teeth or nails, and I will tell you about that. As for teeth, they are bones, and as for nails, they are the knives of the Ethiopians."' (Sahih )

Sunan an-Nasa'i Book 43, Hadith 44