Valmiki Ramayana 6.116.13

सम्भ्रमश्च न गन्तव्यो वर्तन्त्या रावणालये ।विभीषणविधेयं हि लङ्कैश्वर्यमिदं कृतम्॥

sambhramaśca na gantavyo vartantyā rāvaṇālaye |vibhīṣaṇavidheyaṃ hi laṅkaiśvaryamidaṃ kṛtam ||

Our plain-language meaning of this verse is waiting for scholar review.