Mbh 1.1.5

“The Rishi replied, ‘The Purana, first promulgated by the great Rishi Dwaipayana, and which after having been heard both by the gods and the Brahmarshis was highly esteemed, being the most eminent narrative that exists, diversified both in diction and division, possessing subtile meanings logically combined, and gleaned from the Vedas, is a sacred work. Composed in elegant language, it includeth the subjects of other books. It is elucidated by other Shastras, and comprehendeth the sense of the four Vedas. We are desirous of hearing that history also called Bharata, the holy composition of the wonderful Vyasa, which dispelleth the fear of evil, just as it was cheerfully recited by the Rishi Vaisampayana, under the direction of Dwaipayana himself, at the snake-sacrifice of Raja Janamejaya?’