Valmiki Ramayana Sundara Kanda Sarga 52 Shloka 10
Original Shlokaविभीषणवचः श्रुत्वा रावणो राक्षसेश्वरः। रोषेण महताविष्टो वाक्यमुत्तरमब्रवीत्।।5.52.10।।
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राक्षसेश्वरः lord of ogres, रावणः Ravana, विभीषणवचः Vibhishana's words, श्रुत्वा hearing, महता higly, रोषेण with anger, आविष्टः overcome, उत्तरम् reply, वाक्यम् these words, अब्रवीत् spoken.
Ravana, the lord of demons heard Vibhishana's words and overcome with anger replied: