Narrated `Abdullah bin `Umar
Allah's Messenger (ﷺ) said, "It is not permissible for any Muslim who has something to will to stay for two nights without having his last will and testament written and kept ready with him."
Narrated `Amr bin Al-Harith
(The brother of the wife of Allah's Messenger (ﷺ). Juwaira bint Al-Harith) When Allah's Messenger (ﷺ) died, he did not leave any Dirham or Dinar (i.e. money), a slave or a slave woman or anything else except his white mule, his arms and a piece of land which he had given in charity.
Narrated Talha bin Musarrif
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).
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?"