Agasthiyar was a Siddhar, or sage, in the Vedas. The clan of Agasthiyar is also mentioned [who?]. to have "authored" many of the mantras in the Rig Veda, the oldest and most adored Hindu scripture, in the sense that the Supreme Brahman first revealed the mantras to him in his mind. The Agasthiyar Samhita was also written by Agasthiyar [ref: Bharathi Dharma] Agasthiyar is considered by some to be the greatest of the Seven Sages or Saptarshis. Additionally, the word is spelled Agasti and Agathiyar. also a Shiva-related name. Urvashi was the place where Mitra and Varuna, the Gods, gave birth to Agasthiyar, the Muni. Agasthiyar, which is also the Indian astronomical name for the Canopus star, is known as the "cleanser of waters" because its rising coincides with the Indian Ocean's calming. Sage Agasthiyar is said to have sought assistance from the Kalakeyas, an Asura clan, after they had fled to the Cosmic Ocean, making it difficult for the Devas to defeat them. The sage took in all of the ocean's water after hearing about the Devas and kept it inside him until the demons were destroyed. He describes and explains how to make medicines for fever (of any kind), cancer, impotence, abdominal problems, brain and eye problems, bone problems, and other conditions in his book. His medications, it is said, have no side effects and provide quick results.