“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).” (Using translation from Ibn Mājah 952)
عَنِ النَّبِيِّ ﷺ أَنَّهُ قَالَ يَقْطَعُ الصَّلَاةَ إِذَا لَمْ يَكُنْ بَيْنَ يَدَيِ الرَّجُلِ مِثْلُ آخِرَةِ الرَّحْلِ الْمَرْأَةُ وَالْحِمَارُ وَالْكَلْبُ الْأَسْوَدُ فَقُلْتُ مَا بَالُ الْأَسْوَدِ مِنَ الْأَحْمَرِ؟ فَقَالَ سَأَلْتُ رَسُولَاللهِ ﷺ كَمَا سَأَلْتَنِي فَقَالَ إِنَّ الْأَسْوَدَ شَيْطَانٌ