(6) باب مَنِ اقْتَنَى كَلْبًا لَيْسَ بِكَلْبِ صَيْدٍ أَوْ مَاشِيَةٍ
Narrated `Abdullah bin `Umar:
Allah's Messenger (ﷺ) said, "If someone keeps a dog neither for guarding livestock, nor for hunting, his good deeds will decrease (in reward) by two Qirats a day.'
Reference: Sahih al-Bukhari 5482
In-book reference: Book 72, Hadith 8
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 67, Hadith 391