Kautilya's Arthashastra 9.7.55

9.7.55

nirantarayogitvāc cārthānarthasaṃśayānāṃ yātrādāv arthaḥ śreyān upasamprāptuṃ pārṣṇigrāhāsārapratighāte kṣayavyayapravāsapratyādeye mūlarakṣaṇeṣu ca bhavati //

Since doubts of wealth and harm are constantly associated with all expeditions, it is better to secure wealth by which it is easy to destroy an enemy in the rear and his allies, to recoup the loss of men and money, to make provisions during the time of sojourning abroad, to make good what is repayable, and to defend the state. Also harm or doubtful prospects of wealth in one's own state are always intolerable.