Arthashastra
आप्त भाव उपगतः प्रवीर पुरुषानस्य उपघातयेत् ॥
After strengthening his intimacy with the enemy, the pretending friend may sow the seeds of dissension between the enemy and his officers and have the latter hanged.
english translation
Apta bhAva upagataH pravIra puruSAnasya upaghAtayet ॥
hk transliteration by Sanscript