Musnad Ahmad 789:41

And I heard the Messenger of Allah, may Allah bless him and grant him peace, saying: "Indeed, I have a basin (Hawd) the distance between Ayla and Sana'a; its width is like its length. In it are two spouts pouring forth from Paradise, one of silver and the other of gold. It is sweeter than honey, colder than snow, and whiter than milk. Whoever drinks from it will never thirst until he enters Paradise. In it are pitchers equal to the number of the stars of the sky."