Muhammad bin Tryf bin Khlyf محمد بن طريف بن خليف · The Chapters on Lost Property

That he went out one day to Al-Baqi', which is the graveyard, to relieve himself. People used to go out to relieve themselves only every two or three days, and their faces was like that of a camel (because of hunger and rough food). Then he entered a ruin and while he was squatting to relieve himself, he saw a rat bringing a Dinar out of a hole, then it went in and brought out another, until it had brought…