Volume 4 · Book 52 · Hadith 125
Narrated 'Amr bin Al-Harith: The Prophet did not leave anything behind him after his death except a white mule, his arms and a piece of land which he left to be given in charity.
— Sahih Bukhari, Volume 4, Book 52: Fighting for the Cause of Allah (Jihaad), Hadith #125