Kautilya's Arthashastra 7.7.14

7.7.14

kalyāṇabuddhinā sambhūyārthaṃ lipseta, anyathā vikrameta //

When a king of superior power and free from all troubles is desirous of causing to his enemy loss of men an money in the latter's ill-considered undertakings, or of sending his own treacherous army abroad, or bringing his enemy under the clutches of an inimical army, or of causing trouble to a reducible and tottering enemy by setting a inferior king against that enemy, or is desirous of having peace for the sake of peace itself and is possessed of good intentions, he may accept a less share in the profit (promise for the army supplied to another) and endeavour to make wealth by combining with an ally if the latter is equally of good intentions; but otherwise he may declare war (against that ally).