The story of Manu - Vaisvati.
Manu was a great king of risis, he was performing penance on one foot with his hands raised. He performed a rigorous Tapas on the banks of river. Once reaching to the water in the banks, he saw a fish looking at him in great vain. The king asks, "Oh. Matsya! you look so beautiful with your blue skin. What is it that has been bothering you?" The fish talks to the king "I am very young in this water living among beasts and bliss, So save me from the harm that can lurk on me." The king takes out the blue beautiful young fish out of the river and puts in to a small pond. The fish starts growing by days. The king looks at the growing fish & decides to accommodate a place for its size, he kept changing the place of fish from pond to a lake to a river to Ganga. Finally, when the fish became so big it couldn't fit in Ganga. King had to leave it in to the oceans. The big fish talks to the king "O! The great king of the earth. you are kind and beloved t...