SB 11.17.17
tejo balam dhrtih sauryam
titiksaudaryam udyamah
sthairyam brahmanyam aisvaryam
ksatra-prakrtayas tv imah
Translation:
Dynamic power, bodily strength, determination, heroism, tolerance, generosity, great endeavor, steadiness, devotion to the brahmanas and leadership are the natural qualities of the ksatriyas.