Kautilya's Arthashastra 7.7.26

7.7.26

yātavyasaṃhito vā tiṣṭhet, dūṣyāmitrāṭavīdaṇḍaṃ vāsmai dadyāt //

When a king is desirous of keeping under his power another king of superior or inferior power as an assailable enemy and of destroying the latter after routing out another enemy with the help of the latter, or when he is desirous of getting back whatever he has paid (as subsidy), he may send a proposal of peace to another on the condition of paying more than the cost of the army supplied. If the king to whom this proposal is made is powerful enough to retaliate he may declare war; or if otherwise, he may accept the terms; or he may keep quiet allied with the assailable enemy; or he may supply the proposer of peace with his army full of traitors, enemies and wild tribes.