yathā mūladravyaprasūtasya hiraṇyādeḥ phalaprabandhasya sa{ma}bhāve vinaṣṭam api mūladravyamavinaṣṭam ity ucyate tadvat karmāpi //
Just as when the stream of interest produced from the principal sum of money etc. becomes equal [to the principal], even though the principal sum is [actually] destroyed, it is said to be "not destroyed", similarly with karma also.