Onam Legend continued

Vamana came to the Yaga-shala. As he was approaching them, the sages assembled there perceived the extraordinary effulgence form of the young lad. Mahabali went forth to receive the Brahmin boy with all traditional honours and gave him an eminent seat befitting the status of a holy person. Bali with the usual courtesy given to the people who come to ask for help told him Master! It is my good fortune that you have chosen to honour me with your presence. Whatever you desire, I am here ready to fulfil the same. Vamana smiled and said: "You need not give me anything great. It is enough if you give me that extend of land covered by three footsteps of mine".

On hearing him, Bali's preceptor, Shukracharya a Daitya priest, who could have vision of the future told Bali that the one, who had come to seed a gift from Bali was not an ordinary Brahmin but Lord Narayana Himself who had assumed this form. He advised Bali not to promise the lad anything. But Bali was a king who would never go back on his word and told his Guru that he would never break his promise. He was determined to give Vamana whatever he wanted since breaking one's word was a sin and he had to keep his pledge Shukracharya insisted that he should not fulfil the demand of Vamana as he had come to deprive Bali of all His possessions.

He asked Vamana to measure the three feet of land as desired by him. All attempts of Shukracharya to dissuade Bali from offering the land desired by Vamana proved futile. Vamana grew in size until he towered above the heavens. With one foot, he measured all of the earth. With the other, he claimed all of heaven. There was still one foot of territory that Bali owed him. Bali offered his head to be measured as the third step of land which Lord Vamana had asked for as alms. For the devotion of this Daitya Mahabali, Lord Vishnu (Vamana) granted him rule over Patala.

As a last wish Mahabali was granted the permission to visit his subjects once a year. Thus, Keralites celebrate Onam festival to commemorate the memory of a Great King Mahabali who would keep his promise.