bhagavate krsna-lila varnila vedavyasa
caitanya-lilate vyasa--vrndavana dasa
bhagavate—in Srimad-Bhagavatam; krsna-lila—the pastimes of Lord Krsna; varnila—described; veda-vyasa—Dvaipayana Vyasadeva; caitanya-lilate—in the pastimes of Lord Caitanya; vyasa—Vedavyasa; vrndavana dasa—Srila Vrndavana dasa Thakura.
Srila Vyasadeva described the pastimes of Krsna in Srimad-Bhagavatam. The Vyasa of the pastimes of Lord Caitanya Mahaprabhu was Vrndavana dasa.
Srila Vrndavana dasa Thakura was an incarnation of Vedavyasa and also a friendly cowherd boy named Kusumapida in krsna-lila. In other words, the author of Sri Caitanya-bhagavata, Srila Vrndavana dasa Thakura, the son of Srivasa Thakura's niece Narayani, was a combined incarnation of Vedavyasa and the cowherd boy Kusumapida. There is a descriptive statement by Srila Bhaktisiddhanta Sarasvati Thakura in his commentary on Sri Caitanya-bhagavata giving the biographical details of the life of Vrndavana dasa Thakura.
Link to this page: http://prabhupadabooks.com/cc/adi/11/55