Sahih Muslim Book 45, Hadith 58
He said: Yes, by Him in Whose Hand is my life, there is no Muslim upon the earth." The rest of the hadith is the same.
I visited Allah's Messenger (ﷺ) as he was running a high temperature. I touched his body with my hand and said to him: Allah's Messenger, you are running a high temperature, whereupon Allah's Messenger (ﷺ) said: Yes, it is so. I comparatively have a more severe fever than any one of you. I said: Is it because there is a double reward in store for you? Thereupon Allah's Messenger (ﷺ) said: Yes, it is so. And Allah's Messenger (ﷺ) again said: When a Muslim falls ill, his compensation is that his minor sins are obliterated just as leaves fall (in autumn). In the hadith transmitted on the authority of Zubair there is (no mention of these words):" I touched his body with my hands."
What makes you laugh? They said: Such and such person stumbled against the rope of the tent and he was about to break his neck or lose his eyes. She said: Don't laugh for I heard Allah's Messenger (ﷺ) as saying: If a Muslim runs a thorn or (gets into trouble) severe than this, there is assured for him (a higher) rank and his sins are obliterated.