In the first part of the seventh Sandhi of Ādiparva, Vaiśampāyana narrates how the Kaurava-s and Pāṇḍava-s become proficient in the various arts of warfare including horse-riding, elephant riding and chariot riding. Seeking the best archer among them, Droṇa arranges a difficult test, which Arjuna passes with flying colours. Pleased Droṇa teaches Arjuna the use of various secret and divine weapons. Having completed training the princes, Droṇa approaches Dhṛtarāṣṭra, Vidura and Bhīṣma asking them to evaluate how well their children had learnt under him. Bhīṣma gladly accepts this proposal and they pick a suitable place and erect a huge stadium outside Hastinapura for the display of the skills of the princes. Kings from various kingdoms arrive at Hastinapura to watch this spectacle.
On the auspicious day, crowds throng to Hastinapura as if it was some huge festival. The hundred and one Kaurava-s led by Duryodhana and the five Pāṇḍava-s led by Yudhiṣṭhira arrive into the the stadium with Aśvatthāma, Kṛpācārya, Karṇa alongside them, and Drona walking ahead of them. That day the world witnessed the glory of the great teacher of weapons Droṇacārya.
Audio Link: https://archive.org/download/kumaravyasa-bharata-recitation/Parva-01-Adiparva-007-Sandhi-Part-01-of-04.mp3
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Kumaravyasa Bharata Recitation 