As per Padma Purana, a king called Vasu (also known as Uparisravas), had the ability to fly. He was killing the demons who were troubling the masses. While flying over this place, he mistook some sages as demons and attacked them. Vishnu came in as a 16 year old boy and defeated Vasu. It took a bit of time for Vasu to realise it was Vishnu who came in disguise. He prayed to Vishnu to marry his daughter Padmini. Pleased by his devotion, Vishnu agreed to marry Padmini.