Let me offer my respectful obeisances unto him [Śuka], the spiritual master of all sages, the son of Vyāsadeva, who, out of his great compassion for those gross materialists who struggle to cross over the darkest regions of material existence, spoke this most confidential supplement to the cream of Vedic knowledge, after having personally assimilated it by experience.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यः स्वानुभावमखिलश्रुतिसारमेक- मध्यात्मदीपमतितितीर्षतां तमोऽन्धम् । संसारिणां करुणयाऽऽह पुराणगुह्यं तं व्याससूनुमुपयामि गुरुं मुनीनाम्
yaḥ svānubhāvamakhilaśrutisārameka- madhyātmadīpamatititīrṣatāṃ tamo'ndham | saṃsāriṇāṃ karuṇayā''ha purāṇaguhyaṃ taṃ vyāsasūnumupayāmi guruṃ munīnām
SB 1.2.3