Valmiki Ramayana Kishkindha Kanda Sarga 64 Shloka 8

सहसा at once, सर्वे all, वानराः monkeys, आकाशमिव looking like the sky, दुष्पारम् impossible to cross, सागरम् ocean, प्रेक्षय seeing, विषेदुः worried, कथम् how, कार्यम् the task can be performed, इति thus, ब्रुवन् while saying

All the monkeys were worried when they suddenly saw the ocean which looked impassable like the sky. They wondered if they can at all accomplish the task (of finding Sita)