Kucchivikara-vatthu: The Monk with Dysentery
Now at that time a certain monk was sick with dysentery. He lay fouled in his own urine & excrement. Then the Blessed One, on an inspection tour of the lodgings with Ven. Ananda as his attendant, went to that monk's dwelling and, on arrival, saw the monk lying fouled in his own urine & excrement. On seeing him, he went to the monk and said, "What is your sickness, monk?"
"I have dysentery, O Blessed One."
"But do you have an attendant?"
"No, O Blessed One."
"Then why don't the monks attend to you?"
"I don't do anything for the monks, lord, which is why they don't attend to me."
Then the Blessed One addressed Ven. Ananda: "Go fetch some water, Ananda. We will wash this monk."
"As you say, lord," Ven. Ananda replied, and he fetched some water. The Blessed One sprinkled water on the monk, and Ven. Ananda washed him off. Then — with the Blessed One taking the monk by the head, and Ven. Ananda taking him by the feet — they lifted him up and placed him on a bed.
...
Then the Blessed One, from this cause, because of this event, had the monks assembled ... "Monks, you have no mother, you have no father, who might tend to you. If you don't tend to one another, who then will tend to you? Whoever would tend to me, should tend to the sick. ... A nurse endowed with five qualities is fit to tend to the sick: He is competent at mixing medicine; he knows what is amenable or unamenable to the patient's cure, taking away things that are unamenable and bringing things that are amenable; he is motivated by thoughts of good will, not by material gain; he does not get disgusted at cleaning up excrement, urine, saliva, or vomit; and he is competent at instructing, urging, rousing, & encouraging the sick person at the proper occasions with a talk on Dhamma. A nurse endowed with these five qualities is fit to tend to the sick.
http://www.accesstoinsight.org/tipit...1-08.than.html