Valmiki Ramayana Yuddha Kanda Sarga 74 Shloka 40
Original Shlokaसाघूर्णितमहाद्वाराप्रभग्नगृहगोपुरा । लङ्कात्रासाकुलारात्रौप्रवृत्तेवाभवत्तदा ।।6.74.40।।
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तदा then, घूर्णितमहाद्वारा mighty gates shaken, प्रभग्नगृहगोपुरा shattered the homes and gates, त्रासाकुला stricken with fear, लङ्का Lanka, रात्रौ night, प्रवृत्तेव dancing and shaking, अभवत् seemed.
Then the mighty gates of Lanka shaking, homes shattered, stricken with fear that night it seemed Lanka was dancing.