He reported God's messenger as saying, “The black stone descended from paradise whiter than milk, but the sins of the descendants of Adam made it black." Ahmad and Tirmidhi transmitted it, the latter saying that this is a hasan sahih tradition.

the Messenger of Allah said: “Al-Kauthar is a river in Paradise, whose banks are of gold, and it flows over pearls and corundum. Its dirt is purer than musk, and its water is sweeter than honey and whiter than milk.”

“I have a Cistern, (as large as the distance) between the Ka’bah and Baitul-Maqdis (Jerusalem). (It is) whiter than milk, and its vessels are the number of the stars. I will be the Prophet with the most followers on the Day of Resurrection.”

“Kauthar is a river in Paradise whose banks are of gold and its bed is of rubies and pearls. Its soil is more fragrant than musk, its water is sweeter than honey and whiter than snow.”

"What is Al-Kawthar?" He said: "That is a river that Allah has given me"- that is, in Paradise- 'whiter than milk and sweeter than honey. In it are birds whose necks are like the necks of camels." 'Umar said: "Indeed this is plump and luxurious then." So the Messenger of Allah (s.a.w) said, "Those who consume it are more plumb than it."

Allah's Messenger, what about the vessels of that Cistern? He said: By Him in Whose Hand is the life of Muhammad, the vessels would outnumber the stars in the sky and its planets shining on a dark cloudless night. These would be the vessels of Paradise. He who drinks out of it (the Cistern) would never feel thirsty. There would flow in it two spouts from Paradise and he who would drink out of it would not feel thirsty; and the distance between its (two corners) is that between 'Amman and Aila, and its water is whiter than milk and sweeter than honey.

“My Cistern is wider than the distance between Ailah and ‘Aden. By the One in Whose Hand is my soul, its vessels are more numerous than the number of stars, and it is whiter than milk and sweeter than honey. By the One in Whose Hand is my soul, I will drive men away from it as a man drives strange camels away from his cistern.” It was said: “O Messenger of Allah, will you recognize us?” He said: “Yes, you will come to me with radiant faces, hands and feet, because of the traces of ablution, and this is not for anyone but you.”

Verily Allah's Messenger (may peace be upon him) said: My Cistern has its dimensions wider than the distance between Aila and Aden, and its water is whiter than ice and sweeter than the honey diluted with milk, and its cups are more numerous than the numbers of the stars. Verily I shall prevent the (faithless) people therefrom just as a man prevents the camels of the people from his fountain. They said: Messenger of Allah, will you recognise us on that day? He said: Yes, you will have distinctive marks which nobody among the peoples (except you) will have; you would come to me with blazing forehead and bright hands and feet on account of the traces of ablution.

"I said: 'O Messenger of Allah! What about the vessels of the Hawd?' He said: 'By the one in Whose Hand is my soul! Its vessels number more than the stars of the heavens and the planets on a clear dark night. (They are) among the vessels of Paradise, whoever drinks from them, he will never be thirsty again. Its longest breadth is the same as its length, like that which is between 'Amman to Aylah, its water is whiter than milk and sweeter than honey.'"

Another chain reports a similar narration.

It has been reported from Ibn 'Umar that the Prophet SAW said: "My Hawd (covers a distance) like what is between Kufah to the Black Stone."

I would be pushing back from my Cistern the crowd of people. I would strike away from it (the Cistern) with my staff the people of Yemen until the water (of the Haud) would spout forth upon them. He was asked about its breadth. He said: From this place of mine to 'Amman, and he was asked about the drink and he said: It is whiter than milk and sweeter than honey. There would spout into it two streamlets having their sources in Paradise. the one is from gold and the other is from silver. This hadith has been narrated on the authority of Hisham with the same chain of transmitters and the words are:" I would be on the Day of Resurrection near the bank of the Cistern."

My Cistern (is as wide and broad that it requires) a month's journey (to go round it) all, and its sides are equal and its water is whiter than silver, and its odour is more fragrant than the fragrance of musk, and its jugs (placed around it) are like stars in the sky; and he who would drink from it would never feel thirsty after that. Asma', daughter of Abu Bakr said: Allah's Messenger (may peace be upon him) said: I would be on the Cistern so that I would be seeing those who would be coming to me from you, but some people would be detained (before reaching me). I would say: My Lord, they are my followers and belong to my Ummah, and it would be said to me: Do you know what they did after you? By Allah, they did not do good after you, and they turned back upon their heels. He (the narrator) said: lbn Abu Mulaika used to say (in supplication): O Allah, I seek refuge with Thee that we should turn back upon our heels or put to any trial about our religion.

"'Umar bin 'Abdul-'Aziz summoned me so I got a ride on a mule." [He said:] "When he entered upon him, he said: 'O Commander of the Believers! My riding mule was troublesome for me.' So he said: 'O Abu Sallam!I did not want to trouble you, but a Hadith which you narrated-from Thawban, from the Prophet (s.a.w) about the Hawd-was conveyed to me,and I wanted you to narrate it directly to me."'Abu Sallam said: "Thawban narrated to me from The Messenger of Allah (s.a.w) who said 'My Hawd (is as large as) from 'Adan to 'Amman of Al-Balqa', its water is whiter than milk and sweeter than honey. Its cups are as numerous as the stars, whoever drinks one drink from it, he will never be thirsty after that again. The first people to arrive at it are the poor among the Muhajirin with disheveled heads, dirty clothes, those whom the women of favor would not marry, nor would the doors be open for them.' 'Umar said: 'But I have married a women of favor and the doors are open for me. I married Fatimah bint 'Abdul-Malik. I shall certainly not wash my head until it is disheveled, nor wash my garment which touches my body until it becomes dirty."

Another chain reports a similar narration.

“Umar bin ‘Abdul-‘Aziz sent for me and I came to him upon the riding animal prepared for swift mail delivery. When I came to him, he said: ‘We have caused you some trouble O Abu Sallam.’ He said: ‘Yes, by Allah, O Commander of the Believers!’ He said: ‘By Allah, we did not want to cause you any hardship, but there is a Hadith which I have heard that you narrate from Thawban, the freed slave of the Messenger of Allah (saw), concerning the Cistern, and I wanted to hear it directly from you.’ He said: “I said: ‘Thawban, the freed slave of the Messenger of Allah (saw), told me that the Messenger of Allah (saw) said: “My Cistern is (wider than) the distance between Ailah and ‘Aden. It is whiter than milk and sweeter than honey, and its cups are as many as the stars in the sky. Whoever drinks from it will never feel thirst again. The first ones who come to drink from it will be the poor Muhajirin, with dirty clothes and disheveled hair, who do not marry refined women and for whom no doors are opened.” ‘Umar wept until his beard became wet, then he said: ‘But I have married refined women and doors have been opened for me. Certainly I will not wash the clothes that are on my body until they become dirt, and I will not comb my hair until it becomes disheveled.’”