Śrīmad-Bhāgavatam · Text 12.4.43
Who is speaking and story frame
इमां वक्ष्यत्यसौ सूत ऋषिभ्यो नैमिषालये ।
दीर्घसत्रे कुरुश्रेष्ठ सम्पृष्ट: शौनकादिभि: ॥ ४३ ॥
imāṁ vakṣyaty asau sūta
ṛṣibhyo naimiṣālaye
dīrgha-satre kuru-śreṣṭha
sampṛṣṭaḥ śaunakādibhiḥ
O best of the Kurus, the same Sūta Gosvāmī who is sitting before us will speak this Bhāgavatam to the sages assembled in the great sacrifice at Naimiṣāraṇya. This he will do when questioned by the members of the assembly, headed by Śaunaka.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.