Mahabharata 7.50.67

मा शुचः पुरुषव्याघ्र पूर्वैरेष सनातनःधर्मकृद्भिः कृतो धर्मः क्षत्रियाणां रणे क्षयः

mā śucaḥ puruṣavyāghra pūrvaireṣa sanātanaḥdharmakṛdbhiḥ kṛto dharmaḥ kṣatriyāṇāṃ raṇe kṣayaḥ

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