Arthashastra
दूष्य युक्त दुष्ट पार्ष्णि ग्राहयोर् दूष्य युक्तम् आप्त पुरुष अधिष्ठितम् असंहतं युध्येत, न दुष्ट पार्ष्णि ग्राहं पृष्ठ अभिघात त्रस्तम् ॥
Of armies either filled with traitors, or frightened by an enemy in the rear, that which is full of traitors may be taken to fight apart under the leadership of a trusted commander, but not the army which is afraid of an attack from the rear.
english translation
dUSya yukta duSTa pArSNi grAhayor dUSya yuktam Apta puruSa adhiSThitam asaMhataM yudhyeta, na duSTa pArSNi grAhaM pRSTha abhighAta trastam ॥
hk transliteration by Sanscript