Indo-European parallels have been proposed between myths of Fenrir and the Persian demon Ahriman. The Yashts refer to a story where Taxma Urupi rode Angra Mainyu as a horse for thirty years. An elaboration of this allusion is found only in a late Parsi commentary. The ruler Taxmoruw (Taxma Urupi) managed to lasso Ahriman (Angra Mainyu) and keep him tied up while taking him for a ride three times a day. After thirty years, Ahriman outwitted and swallowed Taxmoruw. In a sexual encounter with Ahriman, Jamshid, Taxmoruw's brother, inserted his hand into Ahriman's anus and pulled out his brother's corpse. His hand withered from contact with the diabolic innards. The suggested parallels with Fenrir myths are the binding of an evil being by a ruler figure and the subsequent swallowing of the ruler figure by the evil being (Odin and Fenrir), trickery involving the thrusting of a hand into a monster's orifice and the affliction of the inserted limb (Týr and Fenrir).