Musannaf Ibn Abi Shaybah

Hazrat Hudhaifah (may Allah be pleased with him) says that the reservoir is whiter than milk, sweeter than honey, colder than ice, and more fragrant than musk. Its vessels are as numerous as the stars in the sky, and its length is as much as the distance from Aylah to Sana'a. Whoever drinks from it will never feel thirsty again.