Bhagavad Gita 2.3

O Arjuna! Why give way to unmanliness? O thou, who art the terror of thy enemies! Shake off such shameful effeminacy and make ready to act!

क्लैब्यं मा स्म गमः पार्थ नैतत्त्वय्युपपद्यते।
क्षुद्रं हृदयदौर्बल्यं त्यक्त्वोत्तिष्ठ परन्तप॥

klaibyaṃ mā sma gamaḥ pārtha naitattvayyupapadyate|
kṣudraṃ hṛdayadaurbalyaṃ tyaktvottiṣṭha parantapa||

English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).