Śrī Vyāsadeva delivered it to his son, who is the most respected among the self-realized, after extracting the cream of all Vedic literatures and histories of the universe.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
निःश्रेयसाय लोकस्य धन्यं स्वस्त्ययनं महत् । तदिदं ग्राहयामास सुतमात्मवतां वरम्
niḥśreyasāya lokasya dhanyaṃ svastyayanaṃ mahat | tadidaṃ grāhayāmāsa sutamātmavatāṃ varam
SB 1.3.41