Musnad Ahmad 21424

Translation

✧ When one of you stands to pray, he is shielded if there is in front of him something like the back of a saddle. If there is not in front of him something like the back of a saddle, then his prayer is cut off by a donkey, a woman, and a black dog. He said: I said, 'O Abu Dharr, what is it about the black dog as opposed to the red dog or the yellow dog?' He said, 'O son of my brother, I asked the Messenger of God ﷺ just as you asked me, and he said, "The black dog is a devil."'

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