Book 9 Chapter VII Paragraph 24

This explains the situation of doubtful harm in the middle of an expedition. But at the close of an expedition, it is better to acquire wealth either by reducing or destroying a reducible or assailable enemy than to get into a situation of doubtful harm, lest enemies might cause troubles. But, for one who is not the leader of combination of states, it is better to risk the situation of doubtful wealth or harm in the middle or at the close of an expedition, since one is not obliged to continue the expedition.