مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 4098
Game and Animals Which May Be Slaughtered
Dogs - Section 1
عَنِ ابْنِ عُمَرَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسلم: «مَنِ اقْتَنَى كَلْبًا إِلَّا كَلْبَ مَاشِيَةٍ أَوْ ضَارٍ نَقَصَ مِنْ عَمَلِهِ كُلَّ يَوْمٍ قِيرَاطَانِ»
Ibn ‘Umar reported God’s messenger as saying, "If anyone acquires a dog, except a sheepdog or one trained for hunting, two qirats will be deducted from his good deeds daily." (Bukhari and Muslim.)
Mishkat al-Masabih, 4098مُتَّفق عَلَيْهِ (الألباني)