Valmiki Ramayana Sundara Kanda Sarga 55 Shloka 6

उरगः snake, जीर्णाम् worn out, त्वचं यथा as its slough, यः he who, समुत्पतितम् rising, क्रोधम् anger, क्षमया एव with tolerance alone, निरस्यति drives away, सः वै he alone, पुरुषः man, उच्यते is said to be.

'A man who drives away his rising anger with tolerance just as a snake casts off its slough is alone called a truly wise man.