Military Expeditions led by the Prophet (pbuh) (Al-Maghaazi)

Bukhari :: Book 5 :: Volume 59 :: Hadith 737

Narrated Talha:

I asked 'Abdullah bin Abu 'Aufa "Did the Prophet make a will? ' He replied, "No." I further asked, "How comes it that the making of a will was enjoined on the people or that they were ordered to make it? " He said, "The Prophet made a will concerning Allah's Book."