Valmiki Ramayana Yuddha Kanda Sarga 60 Shloka 81
Original Shlokaरावणस्यवचःश्रुत्वागुणदोषौविमृश्यच । पश्चादपिमहाबाहो शत्रून्युधिविजेष्यसि ।।6.60.81।।
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महाबाहो mighty armed, रावणस्य Ravana's, वचः words, श्रुत्वा hearing, गुणदोषौ advantages and disadvantages, विमृश्यच assessing, पश्चात् अपि after that, युधि in war, शत्रून् enemy, विजेष्यसि conquer.
"O Mighty Armed One! You hear from Ravana the advantages and disadvantages and thereafter assess the enemy to conquer."