Agasthiyar, a revered Siddhar or wise sage, holds a prominent place in the Vedas and Hindu scriptures. Some credit he with the authorship of numerous mantras found in the oldest and most revered Hindu text, the Rig Veda. According to legend, these mantras were revealed to him directly by the Supreme Brahman in his mind, underscoring his divine connection. Agasthiyar is also known for his work, the Agasthiyar Samhita, a significant contribution to the world of ancient knowledge and wisdom [ref: Bharathi Dharma]. Among the Seven Sages or Saptarshis, some regard Agasthiyar as the most eminent. Variations of his name include Agasti and Agathiyar. He is closely associated with Lord Shiva.Legend has it that Agasthiyar was born to the Divine beings Mitra and Varuna through Urvashi. His significance extends to Indian astronomy, where the Canopus star is known by his name. This star's rising coincides with the cooling of the Indian Ocean, earning Agasthiyar the title of the "cleanser of waters."
In a remarkable tale of valor, Sage Agasthiyar is said to have sought aid from the Devas when the Asura family known as the Kalakeyas sought refuge in the vast sea, making it nearly impossible for the Devas to defeat them. Upon hearing the Devas' plea, Agasthiyar performed an extraordinary feat by swallowing all the water in the ocean, rendering the demons powerless. This heroic act ensured the safety of the celestial realms.
Agasthiyar's profound knowledge extended to the field of medicine. In his writings, he detailed remedies for a wide range of conditions, including cancer, impotence, abdominal ailments, brain and eye disorders, bone issues, and various types of fevers. Remarkably, his medications were acclaimed for their efficacy, claiming to have no side effects and providing swift relief to those who sought his healing wisdom.