Valmiki Ramayana Yuddha Kanda Sarga 36 Shloka 12
Original Shlokaयदितावत्समुद्रेतुसेतुर्बद्धोयदृच्छया । रामेणविस्मयःकोऽत्रयेवमेभयमागतम् ।।6.36.12।।
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रामेण by Rama, यदृच्छया by chance, समुद्रे on the ocean, सेतुः bridge, बद्धःयदि constructed तावत् by that, अत्र there, येन because of that, मे to me, भयम् fear, आगतम् overtaken, विस्मयः wonder, कः what.
"Rama has constructed a bridge by chance and because of that you are fearing what wonder is there in it?"