Sahih Bukhari Volume 4, Book 51, Hadith Number 2.

Narated By Amr bin Al-Harith : (The brother of the wife of Allah’s Apostle. Juwaira bint Al-Harith) When Allah’s Apostle 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.