Джувейни
The Mongol leader Genghis Khan briefly considered returning to Mongolia through a shorter route which involved crossing the Himalayan foothills. He sent envoys to Iltutmish, asking for the Delhi Sultan's permission to pass through India. No extant sources provide any information about the result of this embassy, but it appears that Genghis Khan abandoned his plan to pass through India. According to the Persian historian Ata-Malik Juvayni, Genghis Khan advanced eastwards into India, but failed to find a suitable route, and therefore, exited the country via Peshawar. It is possible that Genghis Khan, through his envoys, aksed Iltutmish to not aid Jalal ad-Din: Iltutmish seems to have obliged.