The Mahabharata of Krishna-Dwaipayana Vyasa Book 12 Santi Parva

Vyasa is the legendary author of the Mahabharata, Vedas and Puranas, some of the most important works in the Hindu tradition. He is also called Veda Vyasa or Krishna Dvaipayana (referring to his dark complexion and birthplace).The festival of Guru Purnima is dedicated to him. It is also known as Vyasa Purnima, the day believed to be both of his birth and when he divided the Vedas.[1][2] Vyasa is considered one of the seven Chiranjivis (long-lived, or immortals), who are still in existence according to Hindu tradition.Vyasa appears for the first time as the compiler of, and an important character in, the Mahabharata. It is said that he was the expansion of the God Vishnu, who came in Dwaparayuga to make all the Vedic knowledge from oral tradition available in written form. He was the son of Satyavati, adopted daughter of the fisherman Dusharaj and the wandering sage Parashara, who is credited with being the author of the first Purana, Vishnu Purana. He was born on an island in the river Yamuna.[4] Due to his dark complexion, Vyasa was also given the name Krishna, in addition to the name Dwaipayana, meaning island-born]According to the Vishnu Purana, Vyasa was born on an island of the Yamuna at Kalpi.According to legend, in a previous life Vyasa was the Sage Apantaratamas, who was born when Lord Vishnu uttered the syllable Bhu. He was a devotee of Lord Vishnu. Since birth, he already possessed the knowledge of the Vedas, the Dharmashastras and the Upanishads. At Vishnu's behest, he was reborn as Vyasa.Vyasa was the son of Sage Parashara and great grandson of Sage Vashistha. Prior to Vyasa's birth, Parashara had performed a severe penance to Lord Shiva. Shiva granted a boon that Parashara's son would be a Brahmarshi equal to Vashistha and would be famous for his knowledge. Parashara begot Vyasa with Satyavati. She conceived and immediately gave birth to Vyasa. Vyasa became an adult and left, promising his mother that he would come to her when needed.Vyasa acquired his knowledge from the four Kumaras, Narada and Lord Brahma himself.[Vyasa is believed to have lived on the banks of Ganga in modern-day Uttarakhand. The site was also the ritual home of the sage Vashishta, along with the Pandavas, the five brothers of the Mahabharata