Aži Dahāka is the source of the modern Persian word azhdahā or ezhdehā اژدها (Middle Persian azdahāg) meaning "dragon", often used of a dragon depicted upon a banner of war. The Persians believed that the baby of a dragon will be the same color as the mother's eyes. In Middle Persian he is called Dahāg or Bēvar-Asp, the latter meaning "[he who has] 10,000 horses." Several other dragons and dragon-like creatures, all of them malevolent, are mentioned in Zoroastrian scripture. (See Zahhāk).