Valmiki Ramayana Aranya Kanda Sarga 34 Shloka 13
Original Shlokaअमर्षी दुर्जयो जेता विक्रान्तो बुद्धिमान्बली। रामस्य दक्षिणो बाहुर्नित्यं प्राणो बहिश्चरः।।3.34.13।।
1 source checked for this shloka
अमर्षी impatient , दुर्जयः invincible, जेता victorious, विक्रान्तः very bold, बुद्धिमान् intelligent, बली strong, नित्यम् always, रामस्य Rama, दक्षिणः बाहुः right hand, बहिश्चरः moving outside, प्राणः his own life.
He is impatient, invincible, victorious, bold, intelligent and strong. He is even the right hand of Rama, his outer life.