Silsilah as-Sahihah 424 — Prophet's Ummah will have radiant limbs

It is narrated from Sayyiduna Abdullah bin Busr Mazani (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "I will recognize every individual of my Ummah on the Day of Resurrection." The companions asked: O Messenger of Allah! How will you recognize them when the creatures will be so numerous? He (peace and blessings be upon him) said: "If you enter a stable and there are all black horses, but among them there is a horse whose forehead and legs are white, would you recognize that horse?" He said: Why not. The Prophet (peace and blessings be upon him) said: "Then, due to prostration, the foreheads of my Ummah and, due to ablution, their hands and feet will be shining. (Because of this distinguishing mark, I will recognize them)."

It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him), he says: Sayyiduna Abu Dharr (may Allah be pleased with him) was at the place of Rabadhah among his goats. When he returned, the Noble Prophet (peace and blessings be upon him) called out to him: "Abu Dharr!" But he remained silent. The Prophet (peace and blessings be upon him) called out repeatedly, but he remained silent. Finally, the Prophet (peace and blessings be upon him) said: "Abu Dharr! May your mother find you lost." This time he said: I am in a state of janabah (ritual impurity). So the Prophet (peace and blessings be upon him) ordered a slave girl to bring water. When she brought the water, he took cover behind his mount and performed ghusl (ritual bath), and then came to the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) said to him: "(In such a situation) dust is sufficient for you, even if you do not find water for twenty years or ten years. When you find water, then let it touch your skin (i.e., perform ghusl)."