Srimad-Bhagavatam: Canto 7 - Chapter 1 - Verse 22
Sanskrit:
शौर्यं वीर्यं धृतिस्तेजस्त्यागश्चात्मजय: क्षमा ।ब्रह्मण्यता प्रसादश्च सत्यं च क्षत्रलक्षणम् ॥ २२ ॥
ITRANS:
śauryaṁ vīryaṁ dhṛtis tejastyāgaś cātmajayaḥ kṣamābrahmaṇyatā prasādaś casatyaṁ ca kṣatra-lakṣaṇam
Translation:
To be influential in battle, unconquerable, patient, challenging and charitable, to control the bodily necessities, to be forgiving, to be attached to the brahminical nature and to be always jolly and truthful — these are the symptoms of the kṣatriya.