Jawamiʿ al-hikayat wa lawamiʿ al-riwayat 37: A Description of the Rukh.

37

IV. xxiii. 6.
This animal resembles a camel. It has two protuberances on the back and it generally has teeth, the limbs and organs of the body are venomous, and no other animal can escape it. Its spittle, dung, etc., are all deadly poison. Whatever meets its eye becomes its prey, for it runs as swift as the wind, and overtakes all creatures. It kills every animal that it may encounter. If anyone takes refuge from it in the top of a high tree which it cannot get up, it stands at the foot, and curling its tail into a sort of ladle, it tosses its water up — this in a very few moments brings its victim down. If any one to avoid it gets into a well, it will stand at the brink and cast its dung and urine down, and if one drop of this falls upon a man he will die.