Utpanna Ekadashi falls in the Krishna Paksha of Aippasi month and is also known as Urpathi Ekadashi. Lord Krishna explains the greatness of this Ekadashi to Arjuna in Bhavishya Uttara Purana and says that those who wish to start their Ekadashi vrat should start it on Utpanna Ekadashi.
In Satya Yuga, there lived a demon called Mura. He was extremely powerful and defeated all the Devas and the demi gods. He conquered Indra Loka and drove Indra out of his power. Every demi god came under his power and he started ruling the world. His atrocities knew no bounds and the world was trembling under his tyranny. All the Devas and Gods went to Lord Shiva and requested him to give a solution. Shiva told them that Lord Vishnu was the right person to kill Mura.
Then the Devas approached Lord Vishnu and he went with the Devas to Chandravati which was the capital of Mura. Lord Vishnu and Mura fought for a long time and it ended in a wrestling fight between the two. Finding no end to their fight, Lord Vishnu went to Badrikashram and went into Himavati caves there to take rest.
Mura followed Vishnu and found him sleeping in the cave. He wanted to kill the sleeping Lord (Vishnu). In order to destroy this devilish thought in him, a divine form came out of the Yoga Maya of Lord Vishnu. It was feminine in form and was valorous. There was a long fight between the feminine power of Lord Vishnu and Mura. At last, the feminine power of Lord Vishnu kept her feet on Mura’s chest and cut off his head. Thus, Mura was killed.
The Devas and the Gods praised the valour of the feminine form of Lord Vishnu. The God, on waking from His sleep, saw her and named her as ‘Ekadashi’ as she was born on the 11th day of the waning moon in the month of Aippasi. Being pleased with her power, Lord Vishnu asked her what boon she wanted from Him. Ekadashi said:
Oh, Lord of Lords! I want this day to be remembered forever and whoever fasts on this day should be absolved of their sins and get mukti. Grant them all worldly pleasures till they live on earth. And also, grant the boon that who partially observe Ekadashi vrat by taking a meal either at midday or night will get half of the merit of those who observe complete fasting on Ekadashi. “
Lord Vishnu blessed Ekadashi with the following boon:
“Those who fast on Ekadashi thithi will enjoy all worldly pleasures and attain liberation in the end. Ekadashi will be praised forever by the Gods and human beings in all the Yugas. Nothing will please me more than observing Ekadashi fasting. I will bestow every good thing upon them on earth and take them to my abode after death.”
The devotee gets absolved of all his sins and attains liberation.
It gives more merit than bathing in pilgrim spots or donating one thousand cows.
One gains the merit equal to that of donating on Sankranti.
The devotee gets a hundred time more merit than the merit earned by conducting aswamedha Yaga.
It is more meritorious than giving charity in Kurukshetra during a solar or lunar eclipse.
Utpanna Ekadashi fasting is as usual as that of any other Ekadashi vrat.
The beginners of Ekadashi vrat can start from Utpanna Ekadashi and accumulate merits that will take them to the abode of Lord Vishnu.