Kautilya's Arthashastra 9.6.48

9.6.48

tad ubhayavetanā grāhayeyuḥ //

When an enemy's brave soldier, elephant, or horse dies, or is killed, or carried off by spies, other spies may tell the enemy that the death is due to mutual conflict among his followers. The man who is employed to commit such murders may be asked to repeat his work again on the condition of his receiving the balance due to him. He should receive the amount from the recipient of salaries from two states; when the king's party is thus divided, some may be won over (to the side of the conqueror).