The Hen and the Swallow Lyrics

A Hen finding the eggs of a viper, and carefully keeping them warm, nourished them into life. 

A Swallow observing what she had done, said: "You silly creature! Why have you hatched these vipers, which, when they shall have grown, will surely inflict injury on all of us, beginning with yourself?" 

Moral : If we nourish evil, it will sooner or later turn upon us.