Valmiki Ramayana Kishkindha Kanda Sarga 30 Shloka 20

कुमार dear, निस्संशयम् no doubt, कार्यम् the work, अवेक्षितव्यम् should be considered, क्रियाविशेषोऽहि and requires special attention, अनुवर्तितव्यः should be followed, प्रवृत्तस्य (of the work) to be commenced, दुरासदस्य of the unassailable, कार्यस्य of action, फलं च fruit also, चिन्त्यं ननु surely need to think.

'My dear, there is no doubt that I have to consider the work (ahead), give special attention to follow up. Surely I need to think over this herculian task and its achievement'.