What is "horkos"

In Greek mythology, the figure of Horkos ( Greek: , " oath") personifies the curse that will be inflicted on any person who swears a false oath. In Aesop’s Fables there is a cautionary story, numbered 239 in the Perry Index, indicating that retribution is swift where the god is defied. Oath-taking and the penalties for perjuring oneself played an important part in the Ancient Greek concept of justice.