Sahih Bukhari Volume 7, Book 72, Hadith 5486

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا ثَابِتُ بْنُ يَزِيدَ، حَدَّثَنَا عَاصِمٌ، عَنِ الشَّعْبِيِّ، عَنْ عَدِيِّ بْنِ حَاتِمٍ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏"‏ إِذَا أَرْسَلْتَ كَلْبَكَ وَسَمَّيْتَ فَأَمْسَكَ وَقَتَلَ، فَكُلْ، وَإِنْ أَكَلَ فَلاَ تَأْكُلْ، فَإِنَّمَا أَمْسَكَ عَلَى نَفْسِهِ، وَإِذَا خَالَطَ كِلاَبًا لَمْ يُذْكَرِ اسْمُ اللَّهِ عَلَيْهَا فَأَمْسَكْنَ وَقَتَلْنَ فَلاَ تَأْكُلْ، فَإِنَّكَ لاَ تَدْرِي أَيُّهَا قَتَلَ، وَإِنْ رَمَيْتَ الصَّيْدَ فَوَجَدْتَهُ بَعْدَ يَوْمٍ أَوْ يَوْمَيْنِ، لَيْسَ بِهِ إِلاَّ أَثَرُ سَهْمِكَ، فَكُلْ، وَإِنْ وَقَعَ فِي الْمَاءِ فَلاَ تَأْكُلْ ‏"‏‏.‏

Narrated By Adi bin Hatim : The Prophet said, "If you let loose your hound after a game and mention Allah's Name on sending it, and the hound catches the game and kills it, then you can eat of it. But if the hound eats of it, then you should not eat thereof, for the hound has caught it for itself. And if along with your hound, join other hounds, and Allah's Name was not mentioned at the time of their sending, and they catch an animal and kill it, you should not ea: of it, for you will not know which of them has killed it. And if you have thrown an arrow at the game and then find it (dead) two or three days later and, it bears no mark other than the wound inflicted by your arrow, then you can eat of it. But if the game is found (dead) in water, then do not eat of it."