Valmiki Ramayana Yuddha Kanda Sarga 71 Shloka 28
Original Shlokaतस्यासीद्वीर्यवान्पुत्रोरावणप्रतिमोरणे । वृद्धसेवीश्रुतिधरस्सर्वास्त्रविदुषांवरः ।।6.71.28।।
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तस्य to him, वीर्यवान् valiant, रणे in war, रावणप्रतिमः compeer of Ravana, वृद्धसेवी served elders, श्रुतिधरः learned, सर्वास्त्रविदुषाम् well versed in all sastras, वरः blessed, पुत्रः son, आसीत् born.
"To him was born a blessed son, valiant one, compeer of Ravana, who served elders, learned and well versed in sastras."