Śrīmad-Bhāgavatam · Text 4.31.8
Who is speaking and story frame
मैत्रेय उवाच
इति प्रचेतसां पृष्टो भगवान्नारदो मुनि: ।
भगवत्युत्तमश्लोक आविष्टात्माब्रवीन्नृपान् ॥ ८ ॥
maitreya uvāca
iti pracetasāṁ pṛṣṭo
bhagavān nārado muniḥ
bhagavaty uttama-śloka
āviṣṭātmābravīn nṛpān
The great sage Maitreya continued: My dear Vidura, being thus petitioned by the Pracetās, the supreme devotee Nārada, who is always absorbed in thoughts of the Supreme Personality of Godhead, began to reply.
Read Śrīla Prabhupāda's purport on Vedabase.io