Complex sentence: According to the Matsya Purana, the king of ancient DravidaDesa and a devotee of Vishnu, Satyavrata, later known as Manu, was washing his hands in a river when a little fish swam into his hands and pleaded with him to save its life.
Split into simpler sentences: According to the Matsya Purana, the king of ancient DravidaDesa was a devotee of Vishnu named Satyavrata. One day Satyavrata was washing his hands in a river when a little fish swam into his hands and pleaded with him to save its life.