Sayyiduna Abu Rafi' (may Allah be pleased with him) narrates: I slaughtered a goat with a peg. I came to the Prophet (peace and blessings be upon him) and said: "O Messenger of Allah, I have slaughtered a goat with a peg." The Prophet (peace and blessings be upon him) said: "Eat it."
Al-Bazzar recorded it, and al-Tabarani in al-Mu'jam al-Kabir; its narrators are thiqat (trustworthy). In one narration in al-Mu'jam al-Kabir the wording is: The Prophet (peace and blessings be upon him) ate from the meat of that goat.