Valmiki Ramayana Yuddha Kanda Sarga 30 Shloka 11
Original Shlokaएषशैलैश्शिलाभिश्चपूरयित्वामहार्णवम् । द्वारमाश्रित्यलङ्कायारामस्तिष्ठतिसायुधः ।।6.30.11।।
1 source checked for this shloka
एष that way, राम Rama, शैलै rocks, शिलाभिश्च and even stones, महावर्णवम् great ocean, पूरयित्वा filled, सायुध equipped with arms, लङ्काया Lanka's, द्वारम् entrance, आश्रित्य taking position, तिष्ठति stands.
"Having filled the great ocean with rocks and stones in that way, taking position at the entrance of Lanka Rama stands equipped with arms."