Valmiki Ramayana 6.91.40
अयोमुखैस्त्रिर्भिर्विद्ध्वा राक्षसेन्द्रं विभीषणम्।एकैकेनाभिविव्याध तान् सर्वान् हरियूथपान्॥
ayomukhaistrirbhirviddhvā rākṣasendraṃ vibhīṣaṇam |ekaikenābhivivyādha tān sarvān hariyūthapān ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book