Valmiki Ramayana Yuddha Kanda Sarga 105 Shloka 10
Original Shlokaततःक्रोधसमाविष्टोरामोदशरथात्मजः । उवाचरावणंवीरःप्रहस्यपरुषंवचः ।।6.105.10।।
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ततः then, दशरथात्मजः Dasharatha's son, वीरः heroic, रामः Rama, क्रोधसमाविष्टः overcome by anger, प्रहस्य laughing, रावणम् at Ravana, परुषम् harsh, वचः words, उवाच spoke
Then Rama, the heroic son of Dasharatha, overcome by anger, laughing at Ravana, spoke these words.