Valmiki Ramayana Yuddha Kanda Sarga 105 Shloka 11
Original Shlokaममभार्याजनस्थानादज्ञानाद्राक्षसाधम । हृतातेविवशायस्मात्तस्मात्त्वंनासिवीर्यवान् ।।6.105.11।।
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राक्षसाधम lowly Rakshasa, विवशा helpless, ममभार्या my wife, यस्मात् therefore, अज्ञानात् ignorantly, ते you, हृता abducted, तस्मात् therefore, त्वम् you, वीर्यवन् valiant, नासि not
"Lowly Rakshasa! My wife was abducted by you ignorantly when she was helpless. Therefore, you are not valiant."