ذِكْرُ خَبَرٍ أَوْهَمَ عَالِمًا مِنَ النَّاسِ أَنَّ أَوَّلَ هَذَا الْخَبَرِ غَيْرُ مَرْفُوعٍ
Abu Dharr said (and not the Prophet): If there is not anything like the back of a saddle in front of a man who is praying, then a donkey, a black dog, and a woman cut off his prayer. I asked him: Why has the black dog been specified, distinguishing it from a red, a yellow and a white dog? He replied: My nephew, I also asked the Messenger of Allah ﷺ the same question as you asked me. He said: The black dog is a devil. (Using translation from Abū Dāʾūd 702)
يَقْطَعُ صَلَاةَ الرَّجُلِ إِذَا لَمْ يَكُنْ بَيْنَ يَدَيْهِ مِثْلُ آخِرَةِ الرَّحْلِ الْمَرْأَةُ وَالْحِمَارُ وَالْكَلْبُ الْأَسْوَدُ قَالَ قُلْتُ يَا أَبَا ذَرٍّ مَا بَالُ الْأَسْوَدِ مِنَ الْأَبْيَضِ مِنَ الْأَحْمَرِ؟ قَالَ يَا ابْنَ أَخِي سَأَلْتُ رَسُولَ اللَّهِ ﷺ كَمَا سَأَلْتَنِي فَقَالَ «الْكَلْبُ الْأَسْوَدُ شَيْطَانٌ»