Chapter 2 · The Yoga of Knowledge · Krishna said
Bhagavad Gita 2.31 — Your own duty
स्वधर्ममपि चावेक्ष्य न विकम्पितुमर्हसि। धर्म्याद्धि युद्धाच्छ्रेयोऽन्यत्क्षत्रियस्य न विद्यते ॥
svadharmamapi cāvekṣya na vikampitumarhasi | dharmyāddhi yuddhācchreyo'nyatkṣatriyasya na vidyate ||
Meaning
Looking at your own duty as a warrior too, you should not waver. For a kshatriya there is nothing better than a righteous war.