In Brahma Sutra Bhashya of Shri Shankaracharya, while writing Bhashya for 3.3.32
apAntaratamo nAma muniH kali-dvApara-sandhau vyAsatvena sambabhUva
A sage named 'apAntaratamas' incarnated in the confluence of Kali and dvApara yugas with the name / position of 'vyAsa'.
I found this verse of Mahabharata in support of above statement
English Translation. (Note: The chapter number is different because of different editions)
Having said these words unto the Rishi Apantaratamas, otherwise called by the name of Saraswat, the Supreme Lord dismissed him, saying unto him.--Go. I am he that was born as Apantaratamas through the command of Hari. Once more have I taken birth as the celebrated Krishna-Dwaipayana, a delighter of the race of Vasishtha. 2 I have thus told you, my dear disciples, the circumstances, of my own former birth which was due to the grace of Narayana in so much that I was a very portion of Narayana himself. Ye foremost of intelligent persons, I underwent, in days of yore, the austerest penances, with the aid of the highest abstraction of the mind. Ye sons, moved by my great affection for yourselves that are devoted to me with reverence, I have told you everything relating to what you wished to know from me, viz., my first birth in days of remote antiquity and that other birth subsequent to it (viz., the present one)!"
Does this information regarding Shri Veda Vyas being a reincarnation of Sage Apantaratamas mentioned anywhere else other than the above passage whether in Mahabharata or any other ancient scriptures?