كتاب الصلاة
4
The Book of Prayers
(50)
Chapter: The Height Of That Which Serves As A Sutrah For The One Who Is Praying
(50)
باب قَدْرِ مَا يَسْتُرُ الْمُصَلِّيَ ‏‏

Abu Dharr reported:

The Messenger of 'Allah (ﷺ) said: When any one of you stands for prayer and there is a thing before him equal to the back of the saddle that covers him and in case there is not before him (a thing) equal to the back of the saddle, his prayer would be cut off by (passing of an) ass, woman, and black Dog. I said: O Abu Dharr, what feature is there in a black dog which distinguish it from the red dog and the yellow dog? He said: O, son of my brother, I asked the Messenger of Allah (ﷺ) as you are asking me, and he said: The black dog is a devil.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا إِسْمَاعِيلُ ابْنُ عُلَيَّةَ، ح قَالَ وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ إِبْرَاهِيمَ، عَنْ يُونُسَ، عَنْ حُمَيْدِ بْنِ هِلاَلٍ، عَنْ عَبْدِ اللَّهِ بْنِ الصَّامِتِ، عَنْ أَبِي ذَرٍّ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ إِذَا قَامَ أَحَدُكُمْ يُصَلِّي 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 أَخِي سَأَلْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم كَمَا سَأَلْتَنِي فَقَالَ ‏"‏ الْكَلْبُ الأَسْوَدُ شَيْطَانٌ ‏"‏ ‏.‏
Reference : Sahih Muslim 510 a
In-book reference : Book 4, Hadith 299
USC-MSA web (English) reference : Book 4, Hadith 1032
  (deprecated numbering scheme)