SB 12.7.7

kaśyapo ’haṁ ca sāvarṇī
 rāma-śiṣyo ’kṛtavraṇaḥ
adhīmahi vyāsa-śiṣyāc
 catvāro mūla-saṁhitāḥ
Synonyms: 
kaśyapaḥ — Kaśyapa; aham — I; ca — and; sāvarṇiḥ — Sāvarṇi; rāma-śiṣyaḥ — a disciple of Rāma; akṛtavraṇaḥ — namely Akṛtavraṇa; adhīmahi — we have assimilated; vyāsa-śiṣyāt — from the disciple of Vyāsa (Romaharṣaṇa); catvāraḥ — four; mūla-saṁhitāḥ — basic collections.
Translation: 
Romaharṣaṇa, a disciple of Vedavyāsa, divided the Purāṇas into four basic compilations. The sage Kaśyapa and I, along with Sāvarṇi and Akṛtavraṇa, a disciple of Rāma, learned these four divisions.