Sahih Muslim Book - 4, Hadith - 1137

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِى شَيْبَةَ حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ ح قَالَ وَحَدَّثَنِى زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ عَنْ يُونُسَ عَنْ حُمَيْدِ بْنِ هِلاَلٍ عَنْ عَبْدِ اللَّهِ بْنِ الصَّامِتِ عَنْ أَبِى ذَرٍّ قَالَ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « إِذَا قَامَ أَحَدُكُمْ يُصَلِّى فَإِنَّهُ يَسْتُرُهُ إِذَا كَانَ بَيْنَ يَدَيْهِ مِثْلُ آخِرَةِ الرَّحْلِ فَإِذَا لَمْ يَكُنْ بَيْنَ يَدَيْهِ مِثْلُ آخِرَةِ الرَّحْلِ فَإِنَّهُ يَقْطَعُ صَلاَتَهُ الْحِمَارُ وَالْمَرْأَةُ وَالْكَلْبُ الأَسْوَدُ ». قُلْتُ يَا أَبَا ذَرٍّ مَا بَالُ الْكَلْبِ الأَسْوَدِ مِنَ الْكَلْبِ الأَحْمَرِ مِنَ الْكَلْبِ الأَصْفَرِ قَالَ يَا ابْنَ أَخِى سَأَلْتُ رَسُولَ اللَّهِ -صلى الله عليه وسلم- كَمَا سَأَلْتَنِى فَقَالَ « الْكَلْبُ الأَسْوَدُ شَيْطَانٌ ».

It was narrated from 'Abdullah bin As-Samit, from Abu Dharr, who said: "The Messenger of Allah (s.a.w) said: 'When one of you stands to offer prayer, he will be screened if he has something in front of him that is like the back of a saddle. If he does not have something in front of him that is like the back of a saddle, then his prayer will be interrupted if a donkey, a woman or a black dog passes in front of him."' I said: "O Abu Dharr! What is the difference between a black dog, and a red or yellow dog?" He said: "O son of my brother, I asked the Messenger of Allah (s.a.w) the same question and he said: 'The black dog is a devil."'