مشكوة المصابيح Mishkat al-Masabih كتاب الزكاة The Book of Zakat
(مَغْفِرَةُ مَنْ سَقَى كَلْبًا عَطْشَانًا)

(Forgiveness for the one who gave water to a thirsty dog)

1 hadith
Hadith 1902
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «غُفِرَ لِامْرَأَةٍ مُومِسَةٍ مَرَّتْ بِكَلْبٍ عَلَى رَأْسِ رَكِيٍّ يَلْهَثُ كَادَ يَقْتُلُهُ الْعَطَشُ فَنَزَعَتْ خُفَّهَا فَأَوْثَقَتْهُ بِخِمَارِهَا فَنَزَعَتْ لَهُ مِنَ الْمَاءِ فَغُفِرَ لَهَا بِذَلِكَ» . قِيلَ: إِنَّ لَنَا فِي الْبَهَائِمِ أَجْرًا؟ قَالَ: «فِي كُلِّ ذَاتِ كبد رطبَة أجر»
Abu Huraira reported God’s messenger as saying, “Forgiveness was granted to an unchaste woman who coming upon a dog panting and almost dead with thirst at the mouth of a well, took off her shoe, tied it with her head-covering, and drew some water for it. On that account she was forgiven.” He was asked whether people received a reward for what they did to animals, and replied, “A reward is given in connection with every living creature.”* (Bukhari and Muslim.) * Literally, everything possessed of a moist liver.
Hadith Reference Mishkat al-Masabih / The Book of Zakat / Hadith: 1902
Hadith Grading الألبانی: مُتَّفَقٌ عَلَيْهِ  |  زبیر علی زئی: متفق عليه
Hadith Takhrij ´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3321) و مسلم (154 / 2245)»