Mahabharata 12.159.57
त्यजत्यकारणे यश्च पितरं मातरं तथापतितः स्यात्स कौरव्य तथा धर्मेषु निश्चयः
tyajatyakāraṇe yaśca pitaraṃ mātaraṃ tathāpatitaḥ syātsa kauravya tathā dharmeṣu niścayaḥ
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book