Language:
كتاب الفرائض
85  
Laws of Inheritance (Al-Faraa'id)
(13)
Chapter: The inheritance of the sisters and brothers
(13)
باب مِيرَاثِ الأَخَوَاتِ وَالإِخْوَةِ
Sahih al-Bukhari 6743

Narrated Jabir:

While I was sick, the Prophet (ﷺ) entered upon me and asked for some water to perform ablution, and after he had finished his ablution, he sprinkled some water of his ablution over me, whereupon I became conscious and said, "O Allah's Messenger (ﷺ)! I have sisters." Then the Divine Verses regarding the laws of inheritance were revealed.

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عُثْمَانَ، أَخْبَرَنَا عَبْدُ اللَّهِ، أَخْبَرَنَا شُعْبَةُ، عَنْ مُحَمَّدِ بْنِ الْمُنْكَدِرِ، قَالَ سَمِعْتُ جَابِرًا ـ رضى الله عنه ـ قَالَ دَخَلَ عَلَىَّ النَّبِيُّ صلى الله عليه وسلم وَأَنَا مَرِيضٌ، فَدَعَا بِوَضُوءٍ فَتَوَضَّأَ، ثُمَّ نَضَحَ عَلَىَّ مِنْ وَضُوئِهِ فَأَفَقْتُ فَقُلْتُ يَا رَسُولَ اللَّهِ إِنَّمَا لِي أَخَوَاتٌ‏.‏ فَنَزَلَتْ آيَةُ الْفَرَائِضِ‏.‏
Reference : Sahih al-Bukhari 6743
In-book reference : Book 85, Hadith 20
USC-MSA web (English) reference : Vol. 8, Book 80, Hadith 735
  (deprecated numbering scheme)