Bhagavatapurana 1.4.3

1.4.3

kasmin yuge pravṛtteyaṃ sthāne vā kena hetunā /
kutaḥ sañcoditaḥ kṛṣṇaḥ kṛtavān saṃhitāṃ muniḥ //

3. “In what Yuga or place, and for what purpose did that happen? By what and at whose instance was the sage Krishna Dwaipayana led to produce this Samhita (work)?”