Prabodhini Ekadashi Vrat Katha, Story of Prabhodhini Ekadashi is associated with the legend of demon Murasura. And the story goes like this…
A demon named Mura had annihilated the entire Devas including the powerful Lord Indra. Vanquished, Lord Indra approached Lord Shiva. He was advised to approach Lord Vishnu for eliminating Mura.
Lord Vishnu hearing the atrocities got enraged and decided to attack Mura with his army. A long battle ensued and he had to fight with bare hands as all his weapons were demolished by the Demon.
Not able to kill the Demon, Lord Vishnu feigned fatigue and retreated to a cave in the Himavati Mountain. The Demon pursued him inside and was delighted to find him sleeping, making the task of killing him, easy. He approached Lord Vishnu, when, suddenly a maiden emerges from Lord Vishnu, fights a hard battle and kills Mura.
Lord Vishnu, getting up, is immensely pleased, tells the maiden that her name will be Ekadashi and offers a boon to be asked. The maiden asks him that, a person who fasts the whole day in her memory should be absolved of all sins committed. Lord Vishnu says “So be it “. He further says that on the 11th day of the Hindu calendar in every month, people fasting in her memory will attain Punya equivalent to conducting an Ashwamedha Yagna.
Lord Krishna tells Arjuna that it is Punya to hear this story. He also confirms to him that any person practicing fasting or part fasting on Ekadashi day will attain Moksha having been absolved of all sins.