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: 4747
This hadith has been transmitted on the authority of Abu Tha'laba al- Khushani with a slight variation of (words): He (the Holy Prophet) said in regard to the game killed by (a trained) dog: Eat after three days provided it has not gone rotten.