Sahih al-Bukhari Book 75, Hadith 17
A Jewish boy used to serve the Prophet (ﷺ) and became ill. The Prophet (ﷺ) went to pay him a visit and said
to him, "Embrace Islam," and he did embrace Islam. Al-Musaiyab said: When Abu Talib was on his
deathbed, the Prophet (ﷺ) visited him.
The Prophet (ﷺ) went to visit a sick bedouin. Whenever the Prophet (ﷺ) went to a patient, he used to say to him, "Don't worry, if Allah will, it will be expiation (for your sins):" The bedouin said, "You say expiation? No, it is but a fever that is boiling or harassing an old man and will lead him to his grave without his will." The Prophet (ﷺ) said, "Then, yes, it is so."
During the ailment of the Prophet (ﷺ) some people came to visits him. He led them in prayer while sitting. but they prayed standing, so he waved to them to sit down. When he had finished the prayer, he said, "An Imam is to be followed, so when he bows, you should bow. and when he raises his head, you should raise yours, and if he prays sitting. you should pray sitting." Abu `Abdullah said Al-Humaidi said, (The order of ) "This narration has been abrogated by the last action of the Prophet (ﷺ) as he led the prayer sitting, while the people prayed standing behind him.'