Bhagavad Gita 2.3

क्लैब्यं मा स्म गम: पार्थ नैत्त्व्युपपद्यते |
क्षुद्रं हृदयदौर्बल्यं त्यक्त्वोत्तिष्ठ परन्तप

Translation

O Parth, it does not befit you to yield to this unmanliness. Give up such petty weakness of heart and arise, O vanquisher of enemies.