Valmiki Ramayana Kishkindha Kanda Sarga 18 Shloka 49
Original Shlokaत्वं हि दृष्टार्थतत्त्वज्ञ: प्रजानां च हिते रतः। कार्यकारणसिद्धौ च प्रसन्ना बुद्धिरव्यया4.18.49।।
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त्वम् you, दृष्टार्थतत्त्वज्ञः wise man given to truth and righteousness, प्रजानाम् people's, हिते wellbeing, रतश्च remain devoted, अव्यया knowing, बुद्धि: sound intellect, कार्यकारणसिद्धौ know for certain about cause and effect, प्रसन्ना is pleasant.
'You are a wise man given to truth and righteousness.You remain devoted to people's wellbeing. As you know for certain about cause and effect your intellect is sound and words pleasant.