SB 12.4.41
purana-samhitam etam
rsir narayano ’vyayah
naradaya pura praha
krsna-dvaipayanaya sah
Translation:
Long ago this essential anthology of all the Puranas was spoken by the infallible Lord Nara-Narayana Rsi to Narada, who then repeated it to Krsna Dvaipayana Vedavyasa.