story of Karva chauth

Once upon a time, there was a queen by the name of Veeravati. She was the only sister of her seven loving brothers. On the occasion of the first Karva Chauth after her marriage, she went to her parents house. After sunrise, she observed a strict fast. The seven brothers who loved her dearly, were very disturbed watching the distress of their sister and decided to end her fast by deceiving her. Then the brothers reflected a mirror through Pipal tree leaves. The sister, taken it as moon rise, broke the fast and took food. However, the moment the queen ate her dinner, she received the news that her husband, the king, was seriously ill.
The queen rushed to her husband's palace and on the way, she met Lord Shiva and his consort, Goddess Parvati. Parvati told her that the king had died because the queen had broken her fast by watching a false moon. However, when the queen asked her for forgiveness, the goddess granted her the boon that the king would be revived. But to achieve this, she would have to undertake the Karva Chauth fast under strict rituals, then only her husband would come top life. Thus, by strictly following all the rituals of Karva chauth, queen Veeravati regained the life of her husband.