Horus was born to the goddess Isis after she retrieved all the dismembered body parts of her murdered husband Osiris, except his penis which was thrown into the Nile and eaten by a catfish, and used her magic powers to resurrect Osiris and fashion a gold phallus to conceive her son. Once Isis knew she was pregnant with Horus, she fled to the Nile Delta marshlands to hide from her brother Set who jealously killed Osiris and who she knew would want to kill their son. There Isis bore a divine son, Horus.

http://en.wikipedia.org/wiki/Horus