Silsilat al-Ahadith al-Sahihah

Sayyiduna Hudhayfah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, the expanse of my Hawd (cistern) is greater than the distance from Aylah to Aden. By the One in Whose hand is my soul! Its cups are more numerous than the stars, its water is whiter than milk and sweeter than honey. By the One in Whose hand is my soul! I will surely drive away some people from my Hawd just as a man drives away a strange camel from his cistern." It was said: O Messenger of Allah! Will you recognize us? He (peace and blessings be upon him) said: "Yes! You will come to me with your foreheads, hands, and feet shining due to the effects of ablution. This sign (and virtue) will not be for anyone else."

Abu Hazim says: I was behind Sayyiduna Abu Hurairah (may Allah be pleased with him), he performed ablution for prayer, and (while washing his arms) he extended his hand up to the armpits. I said: Abu Hurairah! What kind of ablution is this? He said: Banu Farukh! Are you also present here? If I had known that you people were here, I would not have performed ablution in this manner. I have heard my beloved (Prophet) (peace and blessings be upon him) say: "The adornment of a believer will reach as far as the water of ablution reaches."

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)."