Horkos was the personification of the curse that would befall upon any person that broke an oath they had taken. He was a god, the son of the goddess Eris (strife), and brother of Ponos, Limos, Algea, the Hysminai, the Makhai, the Phonoi, the Androktasiai, the Neikea, the Pseudologoi, the Amphilogiai, Dysnomia, Ate, and Lethe. They were all personifications of wrong doings or negative situations, such as pain, fights, murder, lies and forgetfulness.
Horkos made an appearance in one of Aesop's Fables, in which a man asked a friend to lend him money, without intending to return it. His friend told him to swear that he would return it some day, so he decided to leave from the town. On his way, he saw a man who told him he was Horkos and his mission was to hunt bad people. Horkos also told him that he returned to the town every thirty or forty years. Happy that Horkos would not return for so long, the man went back to his friend and claimed he had never received any money. On that same day, Horkos returned and dragged him to the edge of the cliff, saying that if he was provoked, he would return on the same day.
Horkos Is also called Horcus.