Mudgalapurana 1.2.16

1.2.16

sūta uvāca |
śṛṇu śaunaka yatnena kathāṃ bhuvanapāvanīm |
kathayāmi yathātathyaṃ śrutāṃ vyāsamukhena yām ||

Sūta said: / Listen attentively, O Śaunaka, to the story that purifies the world; / I shall relate, just as it is, that which was heard from the mouth of Vyāsa.