Mahabharata 2.41.15
आत्मनिन्दात्मपूजा च परनिन्दा परस्तवःअनाचरितमार्याणां वृत्तमेतच्चतुर्विधम्
ātmanindātmapūjā ca paranindā parastavaḥanācaritamāryāṇāṃ vṛttametaccaturvidham
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book