Chyavana
Chyavana was a sage in Hinduism. He was a son of Bhrigu, also known as Bhrigu Varuni in the Upanishads, and is known for his rejuvenation through a special herbal paste or tonic known as chyavanaprasham, which was prepared by the Ashvins. According to the Mahabharata, he was powerful enough to oppose the celestial thunderbolt of Indra, and was responsible for the Ashvins getting their share of the sacrificial offerings. He created an asura, Mada, to achieve it.
Chyavana is also mentioned in the Rigveda, where he is described as an aged and feeble person whose youth and strength was restored by the twin Aśvins. According to Rigveda X.61:1-3, Cyavāna is a weak opponent of Tūrvayāṇa, an Indra worshipper and a Paktha king, as the former was closer to the Ashvins.
According to one tradition, he married Vaivasvata Manu's daughter Arushi. Their son was Aurva. According to another tradition, he married Sukanyā, daughter of Vedic king Sharyati and granddaughter of Vaivasvata Manu. They had two sons: Apnavana and Dadhicha. He is also considered as the father of Harita and Uddalaka Varuni.
Legend
Birth
According to an account found in the Mahabharata, when Bhrigu's wife Puloma was pregnant and lived in her hermitage, a rakshasa harassed her. Puloma's child slipped from her womb, called a 'chyuta' child in Sanskrit and thus received his name Chyavana. The rakshasa released the mother after seeing the child drop, but immediately got converted into ashes.Chyavana studied the Vedas from his father and later acquired the knowledge of Vedas from Brahma. He subsequently became a Brahmarshi.
Austerities and rejuvenation
The earliest version of the narrative of Chyavana's practice of austerities and subsequent restoration of youth is found in the Brahmanas. A later version of this narrative is found in the Mahabharata. More later versions are found in the Bhagavata Purana and the Padma Purana.''Brahmanas''
In a narrative found in the Satapatha Brahmana, Chyavana is mentioned as a descendant of Bhrigu. While the other Bhrigus were away, Chyavana, with a senile body, was living in his ashrama. Once, King Sharyati, son of Manu, came for hunting near Chyavana's ashrama with his army. Sharyati's children were also with him. They went to Chyavana Rishi's ashrama, where the rishi was in meditation. While white-ants had covered his body, only his eyes were visible. They humiliated Chyavana, and in his fury, the sage cursed them. His curse created discord amongst Sharyati's family. When Sharyati found the cause of his misfortune, he offered his daughter Sukanya in marriage to Chayavana, so that she could take care the revered saint.Later, the Ashvins came to his ashrama, and tried to seduce Sukanya. Sukanya, who refused to leave her husband, instead asked the Ashvins to restore Chyavana's youth. Following their advice, Chyavana's youth was restored by a combination of three treatments. Certain herbs were put into a pond and the rishi was asked to have a dip in the pond. A herbal paste was prepared for application on the body of the rishi, which was part of 'Kayakalpa'. A special herbal paste, chyavanaprasham, was prepared for the rishi to take as a medicine.
In return, the Ashvins obtained a share in the sacrificial offerings in Kurukshetra on her suggestion. In the Aitareya Brahmana, the inauguration of Sharyata by him is compared with Indra's coronation.