Language:
كتاب النكاح
67  
Wedlock, Marriage (Nikaah)
(4)
Chapter: About (marrying) several women
(4)
باب كَثْرَةِ النِّسَاءِ
Sahih al-Bukhari 5067

Narrated 'Ata:

We presented ourselves along with Ibn `Abbas at the funeral procession of Maimuna at a place called Sarif. Ibn `Abbas said, "This is the wife of the Prophet (ﷺ) so when you lift her bier, do not Jerk it or shake it much, but walk smoothly because the Prophet (ﷺ) had nine wives and he used to observe the night turns with eight of them, and for one of them there was no night turn."

حَدَّثَنَا إِبْرَاهِيمُ بْنُ مُوسَى، أَخْبَرَنَا هِشَامُ بْنُ يُوسُفَ، أَنَّ ابْنَ جُرَيْجٍ، أَخْبَرَهُمْ قَالَ أَخْبَرَنِي عَطَاءٌ، قَالَ حَضَرْنَا مَعَ ابْنِ عَبَّاسٍ جَنَازَةَ مَيْمُونَةَ بِسَرِفَ، فَقَالَ ابْنُ عَبَّاسٍ هَذِهِ زَوْجَةُ النَّبِيِّ صلى الله عليه وسلم فَإِذَا رَفَعْتُمْ نَعْشَهَا فَلاَ تُزَعْزِعُوهَا وَلاَ تُزَلْزِلُوهَا وَارْفُقُوا، فَإِنَّهُ كَانَ عِنْدَ النَّبِيِّ صلى الله عليه وسلم تِسْعٌ، كَانَ يَقْسِمُ لِثَمَانٍ وَلاَ يَقْسِمُ لِوَاحِدَةٍ‏.‏
Reference : Sahih al-Bukhari 5067
In-book reference : Book 67, Hadith 5
USC-MSA web (English) reference : Vol. 7, Book 62, Hadith 5
  (deprecated numbering scheme)