The "Yatkar-i-Zariran," purports to tell of the old religious wars of Zoroaster's time, and recounts the heroic deeds of a champion named Zarir, whom Firdausi also mentions, but who is otherwise unknown. Doubtless this very Yatkar or some older version of it was among the sources to which the poet Firdausi appealed in writing his "Shah-Nameh." Indeed, the Parsi translator of the Yatkar tells us that the very words of the "Shah-Nameh" often echo those of the ancient Parsi tale.