SB 3.1.3

rājovāca
kutra kṣattur bhagavatā
 maitreyeṇāsa saṅgamaḥ
kadā vā saha-saṁvāda
 etad varṇaya naḥ prabho
Word for word: 
rājā uvāca — the King said; kutra — wherein; kṣattuḥ — with Vidura; bhagavatā — and with His Grace; maitreyeṇa — with Maitreya; āsa — there was; saṅgamaḥ — meeting; kadā — when; — also; saha — with; saṁvādaḥ — discussion; etat — this; varṇaya — describe; naḥ — unto me; prabho — O my lord.
Translation: 
The King asked Śukadeva Gosvāmī: Where and when did the meeting and discussion take place between Saint Vidura and His Grace Maitreya Muni? Kindly oblige, my lord, and describe this to us.
Purport: 

Exactly as Śaunaka Ṛṣi inquired of Sūta Gosvāmī and Sūta Gosvāmī replied, so Śrīla Śukadeva Gosvāmī replied to King Parīkṣit’s inquiries. The King was very anxious to understand the meaningful discussion that took place between the two great souls.