كتاب الصيد والذبائح
Read the English translation first, with the original Arabic directly underneath.
It was narrated from Ash-Sha bi that; "Adiyy bin Hatim who was neighbor, Dakhilan and Rabitan at An-Nahrain narrated that he asked the Prophet (ﷺ) Saying:
'I releaser my dog and I find another dog with my dog, and I do not know which of them caught (the game).' He said: 'Do not eat, for your only said the name of Allah over your dog, and not over any other dog.""
لاَ تَأْكُلْ فَإِنَّمَا سَمَّيْتَ عَلَى كَلْبِكَ وَلَمْ تُسَمِّ عَلَى غَيْرِهِ