مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 490
Purification
The Cleansing of Impurities - Section 1
عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «إِذَا شَرِبَ الْكَلْبُ فِي إِنَاء أحدكُم فليغسله سبع مَرَّات» وَفِى رِوَايَةٍ لِمُسْلِمٍ: «طَهُورُ إِنَاءِ أَحَدِكُمْ إِذَا وَلَغَ فِيهِ الْكَلْبُ أَنْ يَغْسِلَهُ سَبْعَ مَرَّاتٍ أولَاهُنَّ بِالتُّرَابِ»
Abu Huraira reported God’s messenger as saying, “When a dog drinks out of a vessel belonging to any of you, he must wash it seven times,” (Bukhari and Muslim) In a version by Muslim he said, “When a dog laps the water in a vessel belonging to any of you, he must wash it seven times, using earth the first time.”
Mishkat al-Masabih, 490مُتَّفَقٌ عَلَيْهِ (الألباني)