Arthashastra
निरुत्साहस् तु प्रभाववान् राजा विक्रम अभिपन्नो नश्यति" इत्य् आचार्याः ॥
But a king who has no enthusiasm in himself, will perish though possessed of a strong army.
english translation
nirutsAhas tu prabhAvavAn rAjA vikrama abhipanno nazyati" ity AcAryAH ॥
hk transliteration by Sanscript