It was narrated from ‘Abdullah bin Samit from Abu Dharr, that the Prophet ﷺ said:
“The prayer is severed by a woman, a donkey, and a black dog, if there is not something like the handle of a saddle in front of a man.” I (‘Abdullah) said: “What is wrong with a black dog and not a red one?” He (Abu Dharr) said: ‘I asked the Messenger of Allah ﷺ the same question, and he said: “The black dog is a Shaitan (satan).”

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ حُمَيْدِ بْنِ هِلاَلٍ، عَنْ عَبْدِ اللَّهِ بْنِ الصَّامِتِ، عَنْ أَبِي ذَرٍّ، عَنِ النَّبِيِّ ـ ﷺ ـ قَالَ " يَقْطَعُ الصَّلاَةَ إِذَا لَمْ يَكُنْ بَيْنَ يَدَىِ الرَّجُلِ مِثْلُ مُؤْخِرَةِ الرَّحْلِ الْمَرْأَةُ وَالْحِمَارُ وَالْكَلْبُ الأَسْوَدُ " . قَالَ قُلْتُ مَا بَالُ الأَسْوَدِ مِنَ الأَحْمَرِ فَقَالَ سَأَلْتُ رَسُولَ اللَّهِ ـ ﷺ ـ كَمَا سَأَلْتَنِي فَقَالَ " الْكَلْبُ الأَسْوَدُ شَيْطَانٌ " .