Yogācārabhūmi-śāstra, Volume 34 (23)

Original text: 云何观察内事终殁。所作变异。无常之性。谓由观见。今时存活。安住支持。复于余时。观见死没。唯有尸骸。空无心识。见是事已。便作是念。如是诸行。其性无常。云何观察内事青瘀等。所作变异。无常之性。谓由观见。死已尸骸。或于一时至青瘀位。或于一时至脓烂位。如是乃至。骨锁之位。见是事已。便作是念。如是诸行。其性无常。

Explanation: How does one observe the impermanent nature of the changes that occur in internal bodily phenomena at death? One observes that another person is alive at present, dwelling in the world in peace and stability, and later discovers that he has died, leaving behind only a corpse, empty and devoid of consciousness. After observing this phenomenon, the following thought arises in the mind: such formations are truly impermanent in nature. How does one observe the impermanent nature of the changes that occur in internal bodily phenomena at the stages of livid discoloration and so forth? One observes a corpse that has already died: at one time it reaches the stage of livid discoloration, at another time the stage of suppuration and decay, until in the end only a heap of bones remains. After observing these phenomena, the following thought arises in the mind: such formations are truly impermanent in nature.