Bhagavatapurana 8.24.59

8.24.59

satyavratasya rājarṣermāyāmatsyasya śārṅgiṇaḥ /
saṃvādaṃ mahadākhyānaṃ śrutvā mucyeta kilbiṣāt //

59. He who listens to the glorious narration which comprises the conversation between the saintly king Satyavrata and Sri Narayana who appeared at His will as the Great Fish, becomes absolved from (all) sin.