Sunan an-Nasa'i 4402

It was narrated that Abu Sa'eed Al-Khudri said:"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)