Gāndharva-lakṣaṇa
Traits/Classification of the Gandharvas) and Royal-Genealogical Continuities (Vamśa-prasaṅga
सूत उवाच कुवलाश्वस्य पुत्राणां सहस्राण्येकविंशतिः / सर्वे विद्यासु निष्णाता बलवन्तो दुरासदाः
sūta uvāca kuvalāśvasya putrāṇāṃ sahasrāṇyekaviṃśatiḥ / sarve vidyāsu niṣṇātā balavanto durāsadāḥ
Sūta said: Kuvalāśva had twenty-one thousand sons. All were accomplished in the sciences, mighty in strength, and hard to assail.