Mahabharata 12.36.44

शिष्टाचारश्च शिष्टश्च धर्मो धर्मभृतां वरसेवितव्यो नरव्याघ्र प्रेत्य चेह सुखार्थिना

śiṣṭācāraśca śiṣṭaśca dharmo dharmabhṛtāṃ varasevitavyo naravyāghra pretya ceha sukhārthinā

Our plain-language meaning of this verse is waiting for scholar review.