Mbh 12.139.10

"'"Pujani said, 'Hostility springs from five causes. Persons possessed of learning know it. Those five causes are woman, land, harsh words, natural incompatibility, and injury.[414] When the person with whom hostility occurs happens to be a man of liberality, he should never be slain, particularly by a Kshatriya, openly or by covert means. In such a case, the man's fault should be properly weighed.[415] When hostility has arisen with even a friend, no further confidence should be reposed upon him. Feelings of animosity lie hid like fire in wood. Like the Aurvya fire within the waters of the ocean, the fire of animosity can never be extinguished by gifts of wealth, by display of prowess, by conciliation, or by scriptural learning. The fire of animosity, once ignited, the result of an injury once inflicted, is never extinguished, O king, without consuming outright one of the parties. One, having injured a person, should never trust him again as one's friend, even though one might have (after the infliction of the injury) worshipped him with wealth and honours. The fact of the injury inflicted fills the injurer with fear. I never injured thee. Thou also didst never do me an injury. For this reason I dwelt in thy abode. All that is changed, and at present I cannot trust thee.'