Sahih al-Bukhari 2740
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).
حَدَّثَنَا خَلاَّدُ بْنُ يَحْيَى، حَدَّثَنَا مَالِكٌ، حَدَّثَنَا طَلْحَةُ بْنُ مُصَرِّفٍ، قَالَ سَأَلْتُ عَبْدَ اللَّهِ بْنَ أَبِي أَوْفَى ـ رضى الله عنهما ـ هَلْ كَانَ النَّبِيُّ صلى الله عليه وسلم أَوْصَى فَقَالَ لاَ‏.‏ فَقُلْتُ كَيْفَ كُتِبَ عَلَى النَّاسِ الْوَصِيَّةُ أَوْ أُمِرُوا بِالْوَصِيَّةِ قَالَ أَوْصَى بِكِتَابِ اللَّهِ‏.‏