Arthashastra
स परम् आश्र्त्य पक्ष अपदेशेन स्व विषयात् साचिव्य कर सहाय उपादानं कुर्वीत ॥
The chief may go over to the enemy as a friend and offer to supply him with recruits and other help collected from the conqueror's territory
english translation
sa param Azrtya pakSa apadezena sva viSayAt sAcivya kara sahAya upAdAnaM kurvIta ॥
hk transliteration by Sanscript