Valmiki Ramayana 6.76.71

निकुम्भाग्रज वीर्यं ते बाणवेगवदद्भुतम्।सन्नतिश्च प्रभावश्च तव वा रावणस्य वा॥

nikumbhāgraja vīryaṃ te bāṇavegavadadbhutam |sannatiśca prabhāvaśca tava vā rāvaṇasya vā ||

Our plain-language meaning of this verse is waiting for scholar review.