Valmiki Ramayana Sundara Kanda Sarga 43 Shloka 25
Original Shlokaनेयमस्ति पुरी लङ्का न यूयं न च रावणः।5.43.25।। यस्मादिक्ष्वाकुनाथेन बद्धं वैरं महात्मना।
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यस्मात् since, महात्मना with great self, इक्ष्वाकुनाथेन with the lord of Ikshvaku dynasty, वैरम् enmity, बद्धम् is bound, इयम् this, लङ्कापुरी city of Lanka, नास्ति will not be found, यूयम् even you, न not, रावणः च and Ravana, न also.
"You have established great enmity with the noble lord of Ikshvaku dynasty. Neither this Lanka will endure nor you, nor even Ravana will be traced. इत्यार्षे श्रीमद्रामायणे वाल्मीकीय आदिकाव्ये सुन्दरकाण्डे त्रिचत्वारिशस्सर्गः।। Thus ends the fortythird sarga of Sundarakanda of the holy Ramayana, the first epic composed by sage Valmiki.