Valmiki Ramayana Yuddha Kanda Sarga 58 Shloka 20
Original Shlokaतेषामापततांशीघ्रंनिघ्नतांचापिवानरान् ।।6.58.20।। द्विविदोगिरिशृङ्गेणजघानैकंनरान्तकम् ।
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शीघ्रम् at great speed, आपतताम् rushing, वानरान् Vanaras, निघ्नतांचापि also killing, तेषाम् in that way, एकम् one, नरान्तकम् Naranthaka, द्विविदः Dwivida, गिरिशृङ्गेण with peak of a mountain, जघान struck.
Rushing at great speed, the Rakshasas and also killing the Vanaras in that way, Dwivida alone struck down Naranthaka with a mountain peak.