Sahih al-Bukhari 3098
Sahih al-Bukhari · Book 57: One-fifth of Booty to the Cause of Allah (Khumus) · The expenditure of the wives of the Prophet saws
Narrated `Amr bin Al-Harith:
حَدَّثَنَا مُسَدَّدٌ ، حَدَّثَنَا يَحْيَى ، عَنْ سُفْيَانَ ، قَالَ حَدَّثَنِي أَبُو إِسْحَاقَ ، قَالَ سَمِعْتُ عَمْرَو بْنَ الْحَارِثِ ، قَالَ مَا تَرَكَ النَّبِيُّ صلى الله عليه وسلم إِلاَّ سِلاَحَهُ وَبَغْلَتَهُ الْبَيْضَاءَ، وَأَرْضًا تَرَكَهَا صَدَقَةً.
The Prophet (ﷺ) did not leave anything (after his death) except his arms, a white mule, and a (piece of) land which he had given as Sadaqa.