Sahih al-Bukhari Book 75, Hadith 25
The Prophet (ﷺ) passed by me while I was kindling a fire under a (cooking) pot. He said, "Do the lice of
your head trouble you?" I said, "Yes." So he called a barber to shave my head and ordered me to make
expiation for that."
The Prophet (ﷺ) came to visit me (while I was sick) and he was riding neither a mule, nor a horse.
`Aisha, (complaining of headache) said, "Oh, my head"! Allah's Messenger (ﷺ) said, "I wish that had happened while I was still living, for then I would ask Allah's Forgiveness for you and invoke Allah for you." Aisha said, "Wa thuklayah! By Allah, I think you want me to die; and If this should happen, you would spend the last part of the day sleeping with one of your wives!" The Prophet (ﷺ) said, "Nay, I should say, 'Oh my head!' I felt like sending for Abu Bakr and his son, and appoint him as my successor lest some people claimed something or some others wished something, but then I said (to myself), 'Allah would not allow it to be otherwise, and the Muslims would prevent it to be otherwise".