Mbh 15.34.2a

"Vaisampayana said, 'This is certain, viz., that acts are never destroyed (without their consequences being enjoyed or endured). Bodies, O king, are born of acts; so also are features. The great primal elements are eternal (indestructible) in consequence of the union with them of the Lord of all beings. They exist with what is eternal. Accordingly, they have no destruction when the non-eternal are destroyed. Acts done without exertion are true and foremost, and bear real fruit. The soul, united however with such acts as require exertion for their accomplishment, enjoys pleasure and pain.[50] Though united so (that is, with pleasure and pain), yet it is a certain inference that the soul is never modified by them, like the reflection of creatures in a mirror. It is never destroyed.[51] As long as one's acts are not exhausted (by enjoyment or endurance of their fruits good and bad), so long does one regard the body to be oneself. The man, however, whose acts have been exhausted, without regarding the body to be self, takes the self to be something otherwise.[52] Diverse existent objects (such as the primal elements and the senses, etc.) attaining to a body, become united as one. To men of knowledge who understand the difference (between the body and self), those very objects become eternal.[53] In the Horse-sacrifice, this Sruti is heard in the matter of the slaying of the horse. Those which are the certain possessions of embodied creatures, viz., their life-breaths (and the senses, etc.), exist eternally even when they are borne to the other world. I shall tell thee what is beneficial, if it be agreeable to thee, O king. Thou hast, while employed in thy sacrifices, heard of the paths of the deities. When preparations were made for any sacrifice of thine, the deities became beneficially inclined to thee.