(1) باب الْوَصَايَا
Narrated Al-Aswad:
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?" (ID)
Reference (ID): Sahih al-Bukhari 2741 (ID)
In-book reference (ID): Book 55, Hadith 4 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 4, Book 51, Hadith 4 (ID)