This story is from when Lord Shankar and Lordess Parvati often played dice on Mount Kailash. So one day, there was an argument between Lord Shankar and Parvati about the importance of nature and the superiority of man. Because Lord Shankar was emphasizing on the superiority of man, Lord Shankar told Parvati that the world is an illusion.
Nature is an illusion. Everything is a mirage, here the moment comes and goes, even the food is an illusion. Lordess Parvati, who is the Lordess of all material things including food, got furious on hearing the words of Lord Shiva. Then Lordess Parvati said, "If I am just an illusion, then let's see how you and the rest of the world live without me," saying that she disappeared from the world.
Miss Her disappearance caused an outcry in the universe. Time stood still, the change of seasons stopped, the earth became barren and there was a terrible drought. There was no food available in the three worlds of sky, Hades and earth. The gods, demons and humans were suffering from hunger.
The world was deprived of food and there was famine everywhere. When the followers of Lord Shankar started begging him for food, Lord Shankar went door to door begging for food for the followers. But no one had anything to give. Lord Vishnu said to Lord Shankar. I have heard that a woman in Kashi has started donating food for people. Lord Shankar went to Kashi to beg for food, but when he came to know that there was no one else running the kitchen but his wife Parvati.
She was dressed in purple and brown robes and adorned with ornaments, and she was seated on a throne, serving food one by one to the hungry Gods and the hungry inhabitants of the earth. She also fed her sons Kartikeya and Ganesha.
This beautiful form of lordess Parvati was none other than Goddess Annapurna. Annapurna offered food to Shiva in the form of Donation, and the goddess was pleased and said that "I will reside in Kashi in the form of Annapurna."