Mbh 12.298.1b

Similarly, one whose period of life has not been exhausted can never be slain by any one.[1547] One should prevent one's affectionate seniors from doing unto one (for one's benefit) such acts as are done by menials, as also all such acts as are fraught with injury to others. One should never desire to extend one's own life by taking the lives of others.[1548] When they lay down their lives, it is laudable for all householders observant of the duties of men living in sacred places to lay down their lives on the banks of sacred streams.[1549] When one's period of life becomes exhausted, one dissolves away into the five elements. Sometimes this occurs suddenly (through accidents) and sometimes it is brought about by (natural) causes.[1550] He who, having obtained a body, brings about its dissolution (in a sacred place by means of some inglorious accident), becomes invested with another body of a similar kind. Though set on the path of the Emancipation, he yet becomes a traveller and attains to another body like a person repairing from one room into another.[1551] In the matter of such a man's attainment of a second body (notwithstanding his death in a sacred spot) the only cause is his accidental death. There is no second cause. That new body which embodied creatures obtain (in consequence of the accidental character of their deaths in sacred places) comes into existence and becomes attached to Rudras and Pisachas.[1552] Learned men, conversant with Adhyatma, say that the body is a conglomeration of arteries and sinews and bones and much repulsive and impure matter and a compound of (primal) essences, and the senses and objects of the senses born of desire, all having an outer cover of skin close to them. Destitute (in reality) of beauty and other accomplishments, this conglomeration, through force of the desires of a previous life, assumes a human form.[1553] Abandoned by the owner, the body becomes inanimate and motionless.