Valmiki Ramayana Yuddha Kanda Sarga 67 Shloka 172

रामबाणाभिहतम् killed by Rama's arrow, तत् that, पर्वतसन्निकाशम् like a mountain, रक्षः Rakshasa शिरः head, पापत fallen, चर्यागृहगोपुराणि homes and peaks of buildings, बभञ्ज demolished, उच्चम् tall, तम् they, प्राकारम् defensive walls, अपातयच्च fell down broken.

Killed by Rama's arrow, that head of the Rakshasa, which was like a mountain had demolished the walls and houses and peaks of buildings.