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 1463 b

A hadith like this has been transmitted on the authority of Hisham with the same chain of narrators (and the words are):

When Sauda became old (the rest of the hadith is the same) and in the narration of Sharik there is an addition (of these words:" She was the first woman whom he (Allah's Apostle) married after me."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عُقْبَةُ بْنُ خَالِدٍ، ح وَحَدَّثَنَا عَمْرٌو النَّاقِدُ، حَدَّثَنَا الأَسْوَدُ بْنُ عَامِرٍ، حَدَّثَنَا زُهَيْرٌ، ح وَحَدَّثَنَا مُجَاهِدُ بْنُ مُوسَى، حَدَّثَنَا يُونُسُ بْنُ مُحَمَّدٍ، حَدَّثَنَا شَرِيكٌ، كُلُّهُمْ عَنْ هِشَامٍ، بِهَذَا الإِسْنَادِ أَنَّ سَوْدَةَ، لَمَّا كَبِرَتْ ‏.‏ بِمَعْنَى حَدِيثِ جَرِيرٍ وَزَادَ فِي حَدِيثِ شَرِيكٍ قَالَتْ وَكَانَتْ أَوَّلَ امْرَأَةٍ تَزَوَّجَهَا بَعْدِي ‏.‏
Reference : Sahih Muslim 1463b
In-book reference : Book 17, Hadith 63
USC-MSA web (English) reference : Book 8, Hadith 3452
  (deprecated numbering scheme)