In the presence of `Aisha some people mentioned that the Prophet (ﷺ) had appointed `Ali by will as his successor. `Aisha said, "When did he appoint him by will? Verily when he died he was resting against my chest (or said: in my lap) and he asked for a wash-basin and then collapsed while in that state, and I could not even perceive that he had died, so when did he appoint him by will?"
Sahih al-Bukhari Book 55, Hadith 4
← Previous Hadith I asked `Abdullah bin Abu `Aufa "Did the Prophet (ﷺ) make a will?" He replied, "No," I asked him, "How is it then that the making of a will has been enjoined on people, (or that they are ordered to make a will)?" He replied, "The Prophet (ﷺ) bequeathed Allah's Book (i.e. Qur'an).

Sahih al-Bukhari Book 55, Hadith 3 Next Hadith → The Prophet (ﷺ) came visiting me while I was (sick) in Mecca, ('Amir the sub-narrator said, and he disliked to die in the land, whence he had already migrated). He (i.e. the Prophet) said, "May Allah bestow His Mercy on Ibn Afra (Sa`d bin Khaula)." I said, "O Allah's Messenger (ﷺ)! May I will all my property (in charity)?" He said, "No." I said, "Then may I will half of it?" He said, "No". I said, "One third?" He said: "Yes, one third, yet even one third is too much. It is better for you to leave your inheritors wealthy than to leave them poor begging others, and whatever you spend for Allah's sake will be considered as a charitable deed even the handful of food you put in your wife's mouth. Allah may lengthen your age so that some people may benefit by you, and some others be harmed by you." At that time Sa`d had only one daughter.

Sahih al-Bukhari Book 55, Hadith 5