The exceedingly powerful Kumbhakarņa is mighty by nature: the strength of other redoubtable Rākşasas is owing to boons obtained by them.
प्रकृत्या ह्येष तेजस्वी कुम्भकर्णो महाबलः। अन्येषां राक्षसेन्द्राणां वरदानकृतं बलम्॥