Abayah bin Rafi' narrates from Sayyiduna Rafi' bin Khadij (may Allah be pleased with him): I said: "O Messenger of Allah (peace and blessings be upon him)! Tomorrow we will meet the enemy, and we have no knives. May we slaughter with the peel of a reed and the like?" He (peace and blessings be upon him) said: "Whatever makes the blood flow and over which the name of Allah has been mentioned, eat it; but what is slaughtered with a nail or a tooth, do not eat it, for the tooth is a human bone and the nail is the knife of the Abyssinians."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيد والذبائح / 18935