A long time ago , an Asura (demon) king calledMahabali ruled kerala. He was a wise, benevolent and judicious ruler and beloved of his subjects. Soon his fame as an able king began to spread far and wide, but when he extended his rule to heavens and the netherworld, the Gods felt challenged and began to fear his growing powers.
Presuming that he might become over powerful, Aditi, the mother of devas pleaded with lord Vishnu to curtail Mahabaliâ€™s powers. Vishnu transformed himself into a dwarf called Vamana and approached Mahabali while he was performing a Yajna and asked for alms. Pleased with the dwarf brahminâ€™s wisdom, Mahabali granted him a wish.
The Emperorâ€™s preceptor, Sukracharya warned him against making the gift, for he realized that the seeker was no ordinary person. But the Emperorâ€™s Kingly ego was boosted to that God had asked him for a favor. So he firmly declared that there is no greater sin than going back on oneâ€™s promise.
Std X - B