Mahabharata 1.153.9

1.153.9

tadadbhutatamaṃ śrutvā loke tasya mahātmanaḥ |
vistareṇaiva papracchuḥ kathāṃ tāṃ puruṣarṣabhāḥ || 9 ||

"Then those bulls among men, the Pandavas, hearing of these extraordinary facts regarding that illustrious monarch (Drupada), and desiring to know the details thereof, asked the Brahmana, after his narration was concluded, to satisfy their curiosity. The Pandavas said, 'How, O Brahmana, did the birth of Dhrishtadyumna the son of Drupada, take place from the (sacrificial) fire? How also did the extraordinary birth of Krishna take place from the centre of the sacrificial platform? How also did Drupada's son learn all weapons from the great bowman Drona? And, O Brahmana, how and for whom and for what reason was the friendship between Drona and Drupada broken off?'