Valmiki Ramayana Yuddha Kanda Sarga 126 Shloka 19

समुद्रस्य ocean's, कुक्षौ cavern, एतत् all this, स्कन्धावारनिवेशनम् where troops were stationed, अत्र there, पूर्वम् past, प्रभुः Lord, महादेवः MahaDeva, प्रसादम् bestow grace, अकरोत् basinisland

"Here is a cavern where all these troops were stationed before crossing the ocean. At this place Lord MahaDeva bestowed his grace on me (before construction of the bridge)."