an.5.121 Aṅguttara Nikāya (Numbered Discourses)

Sick

At one time the Buddha was staying near Vesālī, at the Great Wood, in the hall with the peaked roof.
Then in the late afternoon, the Buddha came out of retreat and went to the infirmary, where
he saw a certain mendicant who was weak and sick.
He sat down on the seat spread out,
and addressed the mendicants:
“Mendicants, if a weak and sick mendicant does not neglect five things, it can be expected that
they will soon realize the undefiled freedom of heart and freedom by wisdom in this very life, and live having realized it with their own insight due to the ending of defilements.
What five?
It’s when a mendicant meditates observing the ugliness of the body, perceives the repulsiveness of food, perceives dissatisfaction with the whole world, observes the impermanence of all conditions, and has well established the perception of their own death.
If a weak and sick mendicant does not neglect these five things, it can be expected that
they will soon realize the undefiled freedom of heart and freedom by wisdom in this very life, and live having realized it with their own insight due to the ending of defilements.”