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Persia

Azhi Dahaka (Avestan Great Snake) is a dragon or demonic figure in the texts and mythology of Zoroastrian Persia, where he is one of the subordinates of Angra Mainyu. Alternate names include Azi Dahak, Dahaka, and Dahak. Aži (nominative ažiš) is the Avestan word for "serpent" or "dragon. The Avestan term Aži Dahāka and the Middle Persian azdahāg are the sources of the Middle Persian Manichaean demon of greed "Az", Old Armenian mythological figure Aždahak, Modern Persian 'aždehâ/aždahâ', Tajik Persian 'azhdahâ', Urdu 'azhdahā' (اژدها), as well as the Kurdish ejdîha (ئەژدیها).The name also migrated to Eastern Europe, assumed the form "azhdaja" and the meaning "dragon", "dragoness" or "water snake" in the Balkanic and Slavic languages.

Despite the negative aspect of Aži Dahāka in mythology, dragons have been used on some banners of war throughout the history of Iranian peoples.

The Azhdarchid group of pterosaurs are named from a Persian word for "dragon" that ultimately comes from Aži Dahāka.

Aži Dahāka is the most significant and long-lasting of the ažis of the Avesta, the earliest religious texts of Zoroastrianism. He is described as a monster with three mouths, six eyes, and three heads, and as being cunning, strong, and demonic. In other respects, Aži Dahāka has human qualities, and is never a mere animal. In a post-Avestan Zoroastrian text, the Dēnkard, Aži Dahāka is possessed of all possible sins and evil counsels, the opposite of the good king Jam (or Jamshid). The name Dahāg (Dahāka) is punningly interpreted as meaning "having ten (dah) sins".

In Persian Sufi literature, Rumi writes in his Masnavi that the dragon symbolizes the sensual soul (nafs), greed and lust, that need to be mortified in a spiritual battle.

In Ferdowsi's Shahnameh, the Iranian hero Rostam must slay an 80-meter-long dragon (which renders itself invisible to human sight) with the aid of his legendary horse, Rakhsh. As Rostam is sleeping, the dragon approaches; Rakhsh attempts to wake Rostam, but fails to alert him to the danger until Rostam sees the dragon. Rakhsh bites the dragon, while Rostam decapitates it. This is the third trial of Rostam's Seven Labors.

Rostam is also credited with the slaughter of other dragons in the Shahnameh and in other Iranian oral traditions, notably in the myth of Babr-e-Bayan. In this tale, Rostam is still an adolescent and kills a dragon in the "Orient" (either India or China, depending on the source) by forcing it to swallow either ox hides filled with quicklime and stones or poisoned blades. The dragon swallows these foreign objects and its stomach bursts, after which Rostam flays the dragon and fashions a coat from its hide called the babr-e bayān. In some variants of the story, Rostam then remains unconscious for two days and nights, but is guarded by his steed Rakhsh. On reviving, he washes himself in a spring. In the Mandean tradition of the story, Rostam hides in a box, is swallowed by the dragon, and kills it from inside its belly. The king of China then gives Rostam his daughter in marriage as a reward.