A narrative in the Shiva Purana about the Nageshvara Jyotirlinga tells of a demon named Daaruka, who attacked a Shiva devotee named Supriya and imprisoned him along with many others in his city of Darukavana, a city under the sea inhabited by sea snakes and demons. At the urgent exhortations of Supriya, the prisoners started to chant the holy mantra of Shiva and immediately thereafter Lord Shiva appeared and the demon was vanquished, later residing there in the form of a Jyotirlinga.