Sundara Kanda 43.25

"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.