From Sahih Bukhari (Hadith 2739):
Narrated `Amr bin Al-Harith:(The brother of the wife of Allah's Messenger (ﷺ), Juwairiya 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
Reference: Bukhari 2739