Sahih Muslim , Book 22, Hadith 62 (In-Book) ⓘ
Ibn Umar (Allah be pleased with him) reported Allah's Messenger as saying: He who keeps a dog other than that meant for watching the herd or for hunting loses every day out of his deeds equal to two qirat.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنِ اقْتَنَى كَلْبًا إِلاَّ كَلْبَ مَاشِيَةٍ أَوْ ضَارِي نَقَصَ مِنْ عَمَلِهِ كُلَّ يَوْمٍ قِيرَاطَانِ " .
also referenced under: Hadith 1574 (Reference) & Book 10, Hadith 3815 (USC-MSA)