Valmiki Ramayana Sundara Kanda Sarga 26 Shloka 23

लङ्कां पुरीम् city of Lanka, विधमेच्च he will blow away, महोदधिम् this great ocean, शोषयेच्च will drain it dry, नीचस्य of the mean fellow, रावणस्य Ravana's, कीर्तिम् fame, नाम च and name, नाशयेत् he would have destroyed.

"Had Rama known that I am in Lanka he would have blown up this city, dried up the ocean and destroyed the name and fame of the mean Ravana.