Valmiki Ramayana Kishkindha Kanda Sarga 48 Shloka 12

सत्यवादी truthful, महाभागः an eminent acsetic, तपोधनः rich in penance, परमामर्षी choleric tempered, नियमैः strict follower of austerities, दुष्प्रधर्षणः outrageous, कण्डुर्नाम called Kandu, महर्षिः sage.

There was a sage called Kandu who was truthful, outrageous and shorttempered. He observed strict austerities and was rich in penance.