Mahabharata 3.149.37

क्षत्रधर्मोऽत्र कौन्तेय तव धर्माभिरक्षणम्स्वधर्मं प्रतिपद्यस्व विनीतो नियतेन्द्रियः

kṣatradharmo'tra kaunteya tava dharmābhirakṣaṇamsvadharmaṃ pratipadyasva vinīto niyatendriyaḥ

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