Mahabharata 12.34.2

मा विषादं कृथा राजन्क्षत्रधर्ममनुस्मरस्वधर्मेण हता ह्येते क्षत्रियाः क्षत्रियर्षभ

mā viṣādaṃ kṛthā rājankṣatradharmamanusmarasvadharmeṇa hatā hyete kṣatriyāḥ kṣatriyarṣabha

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