Bhagavad Gita · 18.43

शौर्यं तेजो धृतिर्दाक्ष्यं युद्धे चाप्यपलायनम्।दानमीश्वरभावश्च क्षात्रं कर्म स्वभावजम्॥

śhauryaṁ tejo dhṛitir dākṣhyaṁ yuddhe chāpy apalāyanam dānam īśhvara-bhāvaśh cha kṣhātraṁ karma svabhāva-jam

Valor, vigor, fortitude, skill, not fleeing from battle, generosity, and leadership — these are the natural duties of a Kshatriya.

— Bhagavad Gita 18.43

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)