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»

Abu Huraira reported God’s messenger as saying, "If anyone gets a dog, except a sheepdog or a hunting dog or a farm dog, a qirat of his reward will be deducted daily." (Bukhari and Muslim.)