போகர் or Bogar or Bhogar or Boganathar or Boyang has been authoritatively described in various traditions and texts as a Tamil siddhar who lived sometime between 550 and 300 BCE. More specifically Bogar belongs to a group within 18Siddhars and he belongs to vishwakarma caste of goldsmiths.  Bogar went from Tamil Nadu to China and taught about enlightenment, he mentioned that one of his songs "Bogar 7000, song 6".  Bogar is considered as a contemporary of Thirumoolar. Bogar is said to be in "Nirvigalpa Samadhi" below the sanctum sanatorium of Palani Murugan hill temple,a state where the yogi is mediating immersed inside water
According to legends and the temple scriptures of Palani temple,it is known that Bogar created the idol of Murugan at the hill temple in Palani by mixing nine poisonous herbs (Navapashanam) using an unique procedure. He also established the temple for Murugan in Poombarai Kuzhanthai Velappar temple Kodaikanal Tamilnadu, India. There is an extant statue of lord Murugan by Navaphasanam . The priests of Palani Murugan temple were said to have been the descendants of Pulipani, one of Bogar's students, until the sixteenth century.
According to siddha medicine documents, Bogar was the discoverer of an elixir of immortality. The Pharmacognosy is the best known of his treatises. His other works are on yoga and archery, and a glossary of medicine.
- White, David Gordon (1998). The Alchemical Body: Siddha Traditions in Medieval India. University of Chicago Press. p. 61. ISBN 978-0226894997.
- Lal, Mohan (1992). Encyclopaedia of Indian Literature: sasay to zorgot. Sahitya Akademi. p. 4093. ISBN 8126012218.
- White, David Gordon (2012). The Alchemical Body: Siddha Traditions in Medieval India. University of Chicago Press. p. 376. ISBN 9780226149349.
- Clothey, Fred W.; A.K. Ramanujan (1978). The many faces of Murugan̲: the history and meaning of a South Indian god. Walter de Gruyter. pp. 228–229. ISBN 978-90-279-7632-1. Retrieved 22 September 2010.
- Indian Psychiatric Society (2002). Indian Journal of Psychiatry, Volume 44. Indian Psychiatric Society. p. 167.
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