Krishna, the eighth incarnation of Vishnu, was born to Devaki, sister of the wicked King Kamsa of Mathura. There was a prophecy that Kamsa would be destroyed by a child of Devaki, so he tried to kill Krishna, but he was smuggled to safety and fostered by Nanda, leader of the goatherds, and his wife, Yasoda, as was his older brother, Balarama, also known as Samkarshana. (What happened was that Yasoda's baby girl and Krishna were switched.) When he grew up he returned to Mathura and killed Kamsa.
His story forms part of the Hindu sacred epic, the Mahabharata.