ŚB 1.12.1

The sages assembled in the forest of Naimiṣāraṇya inquired from Sūta Gosvāmī about the birth of Mahārāja Parīkṣit, but in the course of the narration other topics like the release of the brahmāstra by the son of Droṇa, his punishment by Arjuna, Queen Kuntīdevī’s prayers, the Pāṇḍavas’ visit to the place where Bhīṣmadeva was lying, his prayers and thereafter the Lord’s departure for Dvārakā were discussed. His arrival at Dvārakā and residing with the sixteen thousand queens, etc., were narrated. The sages were absorbed in hearing such descriptions, but now they wanted to turn to the original topic, and thus the inquiry was made by Śaunaka Ṛṣi. So the subject of the release of the brahmāstra weapon by Aśvatthāmā is renewed.