“I heard the Prophet ﷺ say: ‘Whoever keeps a dog that he does not need for farming or herding, one Qirat will be deducted from his (good) deeds each day.’” (Using translation from Ibn Mājah 3206)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ مَنِ اقْتَنَى كَلْبًا لَا يُغْنِي مِنْ زَرْعٍ أَوْ ضَرْعٍ نَقَصَ مِنْ عَمَلِهِ كُلَّ يَوْمٍ قِيرَاطٌ قَالَ السَّائِبُ فَقُلْتُ لِسُفْيَانَ أَنْتَ سَمِعْتَ هَذَا مِنْ رَسُولِ اللهِ ﷺ؟ قَالَ نَعَمْ وَرَبِّ هَذَا الْمَسْجِدِ