The gold-giving serpent
From this time forward friendship between us is impossible. Your son struck me in youthful ignorance, and I have bitten him to death. How can I forget the blow with the cudgel? And how can you forget the pain and grief at the loss of your son?" So speaking, it gave the Brahman a costly pearl and disappeared. But before it went away it said: "Come back no more." The Brahman took the pearl, and went back home, cursing the folly of his son.