It is narrated from Sayyiduna Abdullah bin Busr Mazni رضي الله عنه that the Messenger of Allah صلى الله عليه وآله وسلم said: On the Day of Resurrection, I will recognize every individual of my Ummah. The noble Companions asked: O Messenger of Allah! Among so many people, how will you recognize the people of your Ummah? He صلى الله عليه وآله وسلم said: What do you think, if you go to a stable where there are pure black horses and among them there is a horse whose forehead and all four legs are white, would you not quickly recognize it? The Companion رضي الله عنه said: Yes, indeed! He صلى الله عليه وآله وسلم said: Then the foreheads of the individuals of my Ummah will shine because of prostration and their hands and feet will shine because of ablution.