Sahih Muslim Book 21, Hadith Number 4758.

Chapter : It is permissible to eat the animals of water even if they are dead.

‘Amr reported on the authority of Jabir that in the expedition of Khabat (leaves) a person slaughtered three camels, then three, then three, then Abu ‘Ubaida forbade him (to do so fearing that the rides may become short).