The Prophet (Sallallahu 'Alaihi Wa Sallam) said, "This night I dreamt that
two men came and took me to a Holy land whence we proceeded on till we
reached a river of blood, where a man was standing, and on its bank was
standing another man with stones in his hands. The man in the middle of the
river tried to come out, but the other threw a stone in his mouth and
forced him to go back to his original place. So, whenever he tried to come
out, the other man would throw a stone in his mouth and force him to go
back to his former place. I asked, 'Who is this?' I was told, 'The person
in the river was a Riba-eater.