Yazid bin Zari' يزيد بن زريع · The Book of ad-Dahaya (Sacrifices)

the Messenger of Allah gave him some sheep to distribute among his Companions. A small goat was left over and he mentioned that to the Messenger of Allah. He said: "Sacrifice it yourself."

"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 )

"I said: "O Messenger of Allah, is slaughtering only in the throat or upper chest?" He said: 'If you stab it in the thigh, that will suffice,"'(Daif)