The great sage Nārada also inquired in detail from his father, Brahmā, the great-grandfather of all the universe, after seeing him well satisfied.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
तस्मा इदं भागवतं पुराणं दशलक्षणम् । प्रोक्तं भगवता प्राह प्रीतः पुत्राय भूतकृत्
tasmā idaṃ bhāgavataṃ purāṇaṃ daśalakṣaṇam | proktaṃ bhagavatā prāha prītaḥ putrāya bhūtakṛt
SB 2.9.43