Kautilya's Arthashastra 7.3.28

7.3.28

skandhopaneyo bahudhā jñeyaḥ saṃdhir upagrahaḥ /
niruddho deśakālābhyām atyayaḥ syād upagrahaḥ //

Similarly, when peace is concluded by offering money capable of being taken on a man's shoulders, it is termed upagraha, ‘subsidy’; and it is of various forms; Owing to distance and owing to its having been kept long, the amount of the tribute promised may sometimes fall in arrears.