Sahih Bukhari

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)