كتاب الرضاع
17  
The Book of Suckling
(14)
Chapter: It is permissible for a wife to give her turn to a co-wife
(14)
باب جَوَازِ هِبَتِهَا نَوْبَتَهَا لِضَرَّتِهَا ‏‏
Sahih Muslim 1465 a

'Ata related that when they were with Ibn 'Abbas (Allah be pleased with them) at the funeral of Maimuna In Sarif, Ibn 'Abbas (Allah be pleased with them) said:

This is the wife of Allah's Apostle (ﷺ) ; so when you lift her bier, do not shake her or disturb her, but be gentle, for Allah's Messenger (ﷺ) had nine wives, with eight of whom he shared his time, but to one of them, he did not allot a share. 'Ati said: The one to whom he did not allot a share of time was Safiyya, daughter of Huyayy b. Akhtab.
حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، وَمُحَمَّدُ بْنُ حَاتِمٍ، قَالَ مُحَمَّدُ بْنُ حَاتِمٍ حَدَّثَنَا مُحَمَّدُ، بْنُ بَكْرٍ أَخْبَرَنَا ابْنُ جُرَيْجٍ، أَخْبَرَنِي عَطَاءٌ، قَالَ حَضَرْنَا مَعَ ابْنِ عَبَّاسٍ جَنَازَةَ مَيْمُونَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم بِسَرِفَ فَقَالَ ابْنُ عَبَّاسٍ هَذِهِ زَوْجُ النَّبِيِّ صلى الله عليه وسلم فَإِذَا رَفَعْتُمْ نَعْشَهَا فَلاَ تُزَعْزِعُوا وَلاَ تُزَلْزِلُوا وَارْفُقُوا فَإِنَّهُ كَانَ عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم تِسْعٌ فَكَانَ يَقْسِمُ لِثَمَانٍ وَلاَ يَقْسِمُ لِوَاحِدَةٍ ‏.‏ قَالَ عَطَاءٌ الَّتِي لاَ يَقْسِمُ لَهَا صَفِيَّةُ بِنْتُ حُيَىِّ بْنِ أَخْطَبَ ‏.‏
Reference : Sahih Muslim 1465a
In-book reference : Book 17, Hadith 66
USC-MSA web (English) reference : Book 8, Hadith 3455
  (deprecated numbering scheme)