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.  

قَالَ رَسُولُ اللَّهِ ﷺ 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 ﷺ كَمَا سَأَلْتَنِي فَقَالَ الْكَلْبُ الأَسْوَدُ شَيْطَانٌ  

This hadith has been transmitted by Humaid b. Hilal on the authority of Yunus.  

عَنْ حُمَيْدِ بْنِ هِلاَلٍ بِإِسْنَادِ يُونُسَ كَنَحْوِ حَدِيثِهِ  

The Messenger of Allah ﷺ said: A woman, an ass and a dog disrupt the prayer, but something like the back of a saddle guards against that.  

قَالَ رَسُولُ اللَّهِ ﷺ يَقْطَعُ الصَّلاَةَ الْمَرْأَةُ وَالْحِمَارُ وَالْكَلْبُ وَيَقِي ذَلِكَ مِثْلُ مُؤْخِرَةِ الرَّحْلِ