Bhagavatapurana 1.3.42

1.3.42

sarvavedetihāsānāṃ sāraṃ sāraṃ samuddhṛtam /
sa tu saṃśrāvayām āsamahārājaṃ parīkṣitam //

41-42. He taught this work of high merit to his son (Suka), foremost among those that have realised Atman—the work which is great, the source of all that is good, most valuable

by the blessings it brings and intended to guide the world towards the highest purpose;—the Purana which consists of the essence extracted from the Vedas and the Itihasas.

42. And that son (Suka) in his turn explained it to the great King Parikshit—the King who observed the vow of fasting and sat up expecting Death, surrounded by great Rishis.