Valmiki Ramayana Yuddha Kanda Sarga 4 Shloka 112
Original Shlokaदूरपारमसम्बाधं रक्षोगणनिषेवितम् । पश्यन्तो वरुणावासं निषेदुर्हरियूथपाः ।।6.4.112।।
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दूरपारम् shores far away, असम्बाधम् not connected, रक्षोगणनिषेवितम् protected by rakshasa army, वरुणावासम् abode of rain god, पश्यन्तः on seeing,हरियूथपाः vanara army, निषेदुः not obstructed (expansive)
On seeing the expansive ocean, the vanara army thought 'how to cross the abode of rain god whose shores are far away and not connected and is protected by rakshasas'?