SB 9.6.23-24

dhundhumāra iti khyātas
 tat-sutās te ca jajvaluḥ
dhundhor mukhāgninā sarve
 traya evāvaśeṣitāḥ
dṛḍhāśvaḥ kapilāśvaś ca
 bhadrāśva iti bhārata
dṛḍhāśva-putro haryaśvo
 nikumbhas tat-sutaḥ smṛtaḥ
Synonyms: 
dhundhu-māraḥ — the killer of Dhundhu; iti — thus; khyātaḥ — celebrated; tat-sutāḥ — his sons; te — all of them; ca — also; jajvaluḥ — burned; dhundhoḥ — of Dhundhu; mukha-agninā — by the fire emanating from the mouth; sarve — all of them; trayaḥ — three; eva — only; avaśeṣitāḥ — remained alive; dṛḍhāśvaḥ — Dṛḍhāśva; kapilāśvaḥ — Kapilāśva; ca — and; bhadrāśvaḥ — Bhadrāśva; iti — thus; bhārata — O Mahārāja Parīkṣit; dṛḍhāśva-putraḥ — the son of Dṛḍhāśva; haryaśvaḥ — named Haryaśva; nikumbhaḥ — Nikumbha; tat-sutaḥ — his son; smṛtaḥ — well known.
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.