Wikipedia
Parashara ( IAST: ) was a maharishi and the author of many ancient Indian texts. He is accredited as the author of the first Purana, the Vishnu Purana, before his son Vyasa wrote it in its present form. He was the grandson of Vasishtha, the son of Śakti Maharṣi, and the father of Vyasa. There are several texts which give reference to Parashara as an author/speaker. Modern scholars believe that there were many individuals who used this name throughout time whereas others assert that the same Parashara taught these various texts and the time of writing them varied. The actual sage himself never wrote the texts, he was known as a traveling teacher, and the various texts attributed to him are given in reference to Parashara being the speaker to his student. He is the third member of the Ṛṣi Paramparā of the Advaita Guru Paramparā.