Mahabharata 13.135.96
समावर्तो निवृत्तात्मा दुर्जयो दुरतिक्रमःदुर्लभो दुर्गमो दुर्गो दुरावासो दुरारिहा
samāvarto nivṛttātmā durjayo duratikramaḥdurlabho durgamo durgo durāvāso durārihā
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book