Abdullah bin al-Samit عبد الله بن الصامت · The Book on Salat (Prayer)

the Prophet said: "O Abu Dharr! There will be leaders after me who cause the Salat to die; so perform the Salat during its time. If you pray (with them) during its time, then that will be voluntary Salat for you, if not, then you will have attained your Salat."

Allah's Messenger said: "When a man performs Salat, and there is nothing in front of him like the post of a saddle, or a camel saddle, then his Salat is severed by (passing of) a black dog, a woman, and a donkey." It was said to Abu Dharr: "What is the problem with the black dog rather than the red or white one?" He said: "O my nephew! I asked Allah's Messenger just as you have asked me. He said:…