Mansa Devi Story
(Goddess on Shivalik Mountain near Haridwar). When the snake's offering in sacrifice was being conducted by Janmejaya, then god Brahma spoke to gods, "The population of snakes has decreased in the world in a big way. Now a saint named 'Zart-Karu' will have a son named 'Asteek'. He will stop the snake sacrifice." On enquiry of the gods Lord Brahma replied that wife of saint 'Zart- Karu' also will bear the same name. She will be sister of snake king 'Vasuki'. She will give birth to 'Asteek' and he will liberate the snakes.
Then a snake, named 'Aelapatr', said to the snake king Vasuki, "Keeping in view the plight of snakes, I feel you should give the hand of your sister 'Zart-Karu' to saint 'Zart-Karu'. When he will come for alms and ask for her hand, you should immediately offer her."
Meanwhile ocean-churning (Samundar-Manthan) took place. Vasuki was used as a rope in ocean-churning. So gods carried Vasuki to Lord Brahma and the lord asked him to marry his sister to saint Zart-Karu, as told by 'Aelapatr'. Vasuki ordered all the snakes of oworld to locate 'Zart-Karu' and asked them to inform him about the saint's wish to marry his sister.
Readers, this may be foretold that the wife of the same saint 'Zart-Karu' later became famous as 'Mansa Devi'. As per the story, the saint Zart-Karu had vowed to marry a girl of his own name and the girl should be offered in alms, so that the responsibility of looking after her does not fall upon him. Only on meeting the above condition the saint was ready to accept any girl as wife. So to fulfil the wishes (Mansa) of ancestors, wishes of gods and the vow of saint, the sister of 'Vasuki', 'Zart-Karu' became famous as wish fulfilling goddess.