Mbh 12.103.4b

Indeed, he should wait, expecting the opportunity, so that he might come down upon his foe at a time when the latter would not expect him in the least. A king should never slay a large number of the troops of his foe, although he should certainly do that which would make his victory decisive. The king should never do such an injury to his foe as would rankle in the latter's heart.[310] Nor should he cause wounds by wordy darts and shafts. If the opportunity comes, he should strike at him, without letting it slip. Such, O chief of the gods, should be the conduct of a king desirous of slaying his foes towards those that are his foes. If an opportunity, with respect to the man who waits for it, once passes away, it can never be had again by the person desirous of acting. Acting according to the opinions of the wise, a king should only break the strength of his foe. He should never, when the opportunity is not favourable, seek to accomplish his objects. Nor should he, when the opportunity is at hand, persecute his foe.[311] Giving up lust and wrath and pride, the king should, acting with heedfulness, continually watch for the laches of his foes. His own mildness, the severity of his punishments, his inactivity and heedlessness, O chief of the gods, and the deceitful contrivances well applied (by his foes), ruin a foolish ruler. That king who can conquer these four faults and counteract the deceitful contrivances of his enemies succeeds, without doubt, in smiting them all. When only one minister (without needing any help) is competent to accomplish a secret object (of the king), the king should consult with that one minister only in respect of such object. Many ministers, if consulted, endeavour to throw the burden of the task upon one another's shoulders and even give publicity to that object which should be kept secret. If consultation with one be not proper, then only should the king consult with many.