Cybele who purified Dionysus in Phrygia after Hera turned him mad was the great goddess of the land; and the Greeks associated with Rhea and called the mother of the gods. Her cult was orgiastic, often finding expression in violence. Her priests, the Corybantes, as mentioned in the Samothracian Mysteries, dwelt in a cave where they held their ceremonies including a wild an orgiastic weapon-dance, accompanied by the incessant shaking of hands and clanging of swords upon shields. Therefore, her cult was distantly connected to the Dionysian cult A.G.H.
Grimal, Pierre, Larousse World Mythology, Secaucus, New Jersey, Chartwell Books, 1965, pp. 138
Spence, Lewis. An Encyclopaedia of Occultism. New York. University Books. 1960. p. 191