Nārada very much pleased his father and desired to know all about the energies of Viṣṇu, the master of all energies, for Nārada was the greatest of all sages and greatest of all devotees, O King.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तुष्टं निशाम्य पितरं लोकानां प्रपितामहम् । देवर्षिः परिपप्रच्छ भवान् यन्मानुपृच्छति
tuṣṭaṃ niśāmya pitaraṃ lokānāṃ prapitāmaham | devarṣiḥ paripapraccha bhavān yanmānupṛcchati
SB 2.9.42