Mbh 12.109.2c

Indeed, fallen away from the condition of humanity and shut out from the grace of the gods, they are even like evil genii. Without sacrifices and without penances as they are, forbear from their companionship. If their wealth be lost, they commit even suicide which is exceedingly pitiable. Among those sinful men there is no one to whom thou canst say, 'This is thy duty. Let thy heart turn to it.' Their settled convictions are that there is nothing in this world that is equal to wealth. The person that would slay such a creature would incur no sin. He who kills him kills one that has been already killed by his own acts. If slain, it is the dead that is slain. He who vows to destroy those persons of lost senses should keep his vows.[340] Such sinners are, like the crow and the vulture, dependent on deceit for their living. After the dissolution of their (human) bodies, they take rebirth as crows and vultures. One should, in any matter, behave towards another as that other behaves in that matter. He who practises deceit should be resisted with deceit while one that is honest should be treated with honesty."'"