Kautilya's Arthashastra 7.6.20

7.6.20

kṛtasya priyahitābhyām ubhayataḥ paripālanaṃ yathāsambhāṣitasya ca nibandhanasyānuvartanaṃ rakṣaṇaṃ ca "kathaṃ parasmān na bhidyeta" iti kṛtaśleṣaṇam //

When, by the employment of friends (at the Courts of each other), the agreement of peace made is kept secure and the terms are invariably observed and strictly maintained so that no dissension may creep among the parties, it is termed peace with binding terms.