Ramayana
यो विषादं प्रसहते विक्रमे पर्युपस्थिते । तेजसा तस्य हीनस्य पुरुषार्थो न सिध्यति ॥ ४-६४-१२
'If one succumbs to despondency while he has to exhibit his valour, his brilliance gets diminished and he does not succeed in his manly pursuits.' ॥ 4-64-12॥
english translation
yo viSAdaM prasahate vikrame paryupasthite । tejasA tasya hInasya puruSArtho na sidhyati ॥ 4-64-12
hk transliteration by Sanscript