अष्टादशपुराणानां कर्त्ता सत्यवतीसुतः । सूताग्रे कथयामास कथां पापापनोदिनीम्
aṣṭādaśapurāṇānāṃ karttā satyavatīsutaḥ | sūtāgre kathayāmāsa kathāṃ pāpāpanodinīm
Satyavatī’s son (Vyāsa), the composer of the eighteen Purāṇas, narrated—before the Sūta—this account that removes sin.
Narrator/Compiler
Purāṇic listening is presented as a purifying act, with the narrative itself described as sin-removing.
This verse is part of the Kāśī Khaṇḍa’s framing; the glorification of Kāśī follows in the surrounding verses.
Implicitly, śravaṇa (listening) to Purāṇic kathā as a means of purification.