When a man prays and he does not have something like the back of a saddle in front of him as a barrier, his praying is severed by -the passing of- a woman, a donkey, or a black dog. Ibn As-Samet asked: What’s wrong with the black rather than the red? Abu Zthar replied: My nephew, I asked the Messenger of Allah as you asked me, and he said: The black dog is a devil.