Dānavavaṃśa-pradhāna-nāmāvalī
Catalogue of Prominent Sons of Danu
निहतः कुवलाश्वेन उत्तङ्कवचनाद्बिले / बलपुत्रौ महावीर्यौं तेजसाप्रतिमावुभौ
nihataḥ kuvalāśvena uttaṅkavacanādbile / balaputrau mahāvīryauṃ tejasāpratimāvubhau
At Uttanka’s word, within the cavern Kuvalāśva slew Bala’s two sons; both were of mighty valor, unmatched in tejas.