He also prepared himself to reply to all that King Parīkṣit had inquired from him. Mahārāja Parīkṣit was the best in the dynasty of the Pāṇḍus, and thus he was able to ask the right questions from the right person.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
यद्यत्परीक्षिदृषभः पाण्डूनामनुपृच्छति । आनुपूर्व्येण तत्सर्वमाख्यातुमुपचक्रमे
yadyatparīkṣidṛṣabhaḥ pāṇḍūnāmanupṛcchati | ānupūrvyeṇa tatsarvamākhyātumupacakrame
SB 2.8.29