`Abdullah bin `Umar narrated that :
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." (IT)
English reference (IT): Vol. 5, Book 44, Hadith 3361 (IT)
Arabic reference (IT): Book 47, Hadith 3686 (IT)