Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 23-24
Sanskrit:
धुन्धुमार इति ख्यातस्तत्सुतास्ते च जज्वलु: ।धुन्धोर्मुखाग्निना सर्वे त्रय एवावशेषिता: ॥ २३ ॥दृढाश्व: कपिलाश्वश्च भद्राश्व इति भारत ।दृढाश्वपुत्रो हर्यश्वो निकुम्भस्तत्सुत: स्मृत: ॥ २४ ॥
ITRANS:
dhundhumāra iti khyātastat-sutās te ca jajvaluḥdhundhor mukhāgninā sarvetraya evāvaśeṣitāḥ
Translation:
O Mahārāja Parīkṣit, for this reason Kuvalayāśva is celebrated as Dhundhumāra [“the killer of Dhundhu”]. All but three of his sons, however, were burned to ashes by the fire emanating from Dhundhu’s mouth. The remaining sons were Dṛḍhāśva, Kapilāśva and Bhadrāśva. From Dṛḍhāśva came a son named Haryaśva, whose son is celebrated as Nikumbha.