Buddha accepted supply for the last time, to show the disease this time don't forget to remind disciples is uncertain, and that is about to enter the realm of nirvana.
The Buddha accepted the last supply to exhibit such a way that diseases do not forget to remind his disciples moment impermanence, and that is about to enter the realm of big Nirvana.
The Buddha received the last supply, to reflect the disease this way remind students always do not forget impermanence, and that is about to enter the great Nirvana realm.