Sunan an-Nasa'i 3594
سنن النسائي#3594SahihIt was narrated that 'Amr bin Al-Harith said:"The Messenger of Allah did not leave behind a Dinar nor a Dirham, or any slave, male or female; except his white mule which he used to ride, his weapon and some land which he left to be used for the cause of Allah." (One of the narrators) Qutaibah said on one occasion: "In charity
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 29:1