Valmiki Ramayana Yuddha Kanda Sarga 128 Shloka 10
Original Shlokaउपयानंसमुद्रस्यसागरस्य च दर्शनम् । यथा च कारितस्सेतूरावणश्चयथाहतः ।।6.128.10।।
1 source checked for this shloka
समुद्रस्य ocean's, उपयानम् going near, सागरस्य ocean, दर्शनं च appearing before me, सेतुः, यथा so also, कारितः bridge, रावणश्च Ravana, यथा so also, हतः killed
" Also, about my going near ocean and his (Ocean god) appearance before me, construction of the bridge killing of Ravana."