Sahih Muslim
The Book of Games and the Animals which May be Slaughtered and the Aninals that Are to be Eaten (Kitab-us-Said wal-Dhabaih wa ma Yukalu min Al-Hayawan)
Book Number: 021 / Hadith Number: 4742
'Adi b. Hatim reported: I asked Allah's Messenger (may peace be upon him) about hunting. He said: When you shoot your arrow, recite the name of Allah, and if you find it (the arrow) killed (that). then eat, except when you find it fallen into water, for in that case you do not know whether it is water that caused its death or your arrow.