The Book of Sacrifices (Kitab Al-Adahi)
Muslim :: Book 22 : Hadith 4848
Rafi' b. Khadij reported from his grandfather that he said: Allah's Messenger, we are going to encounter the enemy tomorrow, but we do not have long knives with us, should we then slaughter them with the peel of the reed? The rest of the hadith is the same. (And at the end the words are):" A camel became wild (and got out of our control). We attacked it with arrows until we made it fall down." This hadith has been narrated on the authority of Sa'id b. Masruq with the same chain of transmitters with a slight variation of words.