Valmiki Ramayana Yuddha Kanda Sarga 30 Shloka 20
Original Shlokaअथर्क्षरजसःपुत्रोयुधिराजासुदुर्जयः । गद्गदस्याथपुत्त्रोऽत्रजाम्बवानितिविश्रुतः ।।6.30.20।।
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अथ and then, र्क्षरजसः Rksaraja's, पुत्रो son, in war, राजा king, सुदुर्जयः difficult to win over, युधि in war, विश्रुतः widely known, जाम्बवानिति he is known as Jambavan गद्गदस्याथ Gadgada's पुत्त्रोऽत्र son.
"Certainly, king Sugriva, the son of Rksharaja's, is difficult to be conquered in battle. Here is the son of Gadgada, famously called as Jambavan."