The Prophet ﷺ said, "Whoever keeps a (pet) dog which is neither a watch dog nor a hunting dog, will get a daily deduction of two Qirat from his good deeds."
عَنِ النَّبِيِّ ﷺ قَالَ مَنِ اقْتَنَى كَلْبًا لَيْسَ بِكَلْبِ مَاشِيَةٍ أَوْ ضَارِيَةٍ نَقَصَ كُلَّ يَوْمٍ مِنْ عَمَلِهِ قِيرَاطَانِ