Sha'bi reported:I heard Adi b. Hatim say-and he was our neighbour, and our partner and co worker at Nahrain-that he asked Allah's Apostle (may peace he upon him) saying: I let off my dog and find another dog along with my dog and that (any one of them) catches the (game), but I do not know which one had caught it, whereupon he (the Holy Prophet) said: Then don't eat that, for you recited the name of Allah while letting off your dog and did not recite on the other.
وَحَدَّثَنَا مُحَمَّدُ بْنُ الْوَلِيدِ بْنِ عَبْدِ الْحَمِيدِ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ سَعِيدِ بْنِ مَسْرُوقٍ، حَدَّثَنَا الشَّعْبِيُّ، قَالَ سَمِعْتُ عَدِيَّ بْنَ حَاتِمٍ، - وَكَانَ لَنَا جَارًا وَدَخِيلاً وَرَبِيطًا بِالنَّهْرَيْنِ - أَنَّهُ سَأَلَ النَّبِيَّ صلى الله عليه وسلم قَالَ أُرْسِلُ كَلْبِي فَأَجِدُ مَعَ كَلْبِي كَلْبًا قَدْ أَخَذَ لاَ أَدْرِي أَيُّهُمَا أَخَذَ . قَالَ " فَلاَ تَأْكُلْ فَإِنَّمَا سَمَّيْتَ عَلَى كَلْبِكَ وَلَمْ تُسَمِّ عَلَى غَيْرِهِ " .
Muslim
The Book of Hunting, Slaughter, and what may be Eaten • Hadith 8