Language:
كتاب فرض الخمس
57  
One-fifth of Booty to the Cause of Allah (Khumus)
(3)
Chapter: The expenditure of the wives of the Prophet saws
(3)
باب نَفَقَةِ نِسَاءِ النَّبِيِّ صلى الله عليه وسلم بَعْدَ وَفَاتِهِ
Sahih al-Bukhari 3098

Narrated `Amr bin Al-Harith:

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.

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.‏
Reference : Sahih al-Bukhari 3098
In-book reference : Book 57, Hadith 7
USC-MSA web (English) reference : Vol. 4, Book 53, Hadith 330
  (deprecated numbering scheme)