Valmiki Ramayana Yuddha Kanda Sarga 89 Shloka 35

रणे in battle, तयोः both, घोरः terrific, बाणमयः with arrows, यः they सत्रे eyes, दीप्ताभ्याम् glowing, अग्निभ्याम् like fire, कुशमयः kusa grass, यः those, बभूव appeared

In the battle the terrific arrows appeared to the eyes like kusa grass spread by the sacred fire.