Kautilya's Arthashastra 13.3.37

13.3.37

te yuddhāvaskandāvarodhavyasaneṣu śatrum atisaṃdadhyuḥ //

The conqueror may dismiss his chief officers in charge of his forests, country parts, and army, under the pretence of their intrigue with the enemy. Then going over to 'the enemy, they may catch hold of him on occasions of war, siege, or any other troubles; or they may sow the seeds of dissension between the enemy and his party, corroborating the causes of dissension by producing witnesses specially tutored.