Valmiki Ramayana Yuddha Kanda Sarga 69 Shloka 71

विभावसुः like burning, वनानीव forests, हरिसैन्यानि Vanara army, ददाह burnt, वनौकसः Vanaras, वृक्षान् trees, शैलान् rocks, यावत everything, उत्पाटयामासुः uplifting, तावत् many, प्रासहताः lance, वज्रकृत्ताः like thunderbolt, अचलाःइव mountain like, पेतुः fell.

Uplifting his lance in the battle, Naranthaka consumed the Vanara troops as fire would burn up forests even before the Vanaras uprooted trees and rocks. many Vanaras fell like mountains hit by a thunderbolt.