Valmiki Ramayana Sundara Kanda Sarga 34 Shloka 14
Original Shlokaमायां प्रविष्टो मायावी यदि त्वं रावणस्स्वयम्।।5.34.14।। उत्पादयसि मे भूयस्सन्तापं तन्न शोभनम्।
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त्वम् you, मायाम् disguised, प्रविष्टः entered, मायावी trickster, स्वयम् yourself, रावणः यदि if you are Ravana, मे to me, भूयः again, सन्तापम् grief, उत्पादयसि you have created, तत् that, शोभनम् न not good.
"If you are that trickster Ravana who appears incognito before me, it is not good for you. You are causing grief again.