كتاب الحيض
3  
The Book of Menstruation
(12)
Chapter: Ruling on the braids of a woman who is doing ghusl
(12)
باب حُكْمِ ضَفَائِرِ الْمُغْتَسِلَةِ ‏
Sahih Muslim 330 c

This hadith is narrated by the same chain of transmitters by Ahmad al. Darimi, Zakariya b. 'Adi, Yazid, i. e. ' Ibn Zurai', Rauh b. al-Qasim, Ayyub b. Musa with the same chain of transmitters, and there is a mention of these words:

" Should I undo the plait and wash it, because of sexual intercourse?" and there is no mention of menstruation.
وَحَدَّثَنِيهِ أَحْمَدُ الدَّارِمِيُّ، حَدَّثَنَا زَكَرِيَّاءُ بْنُ عَدِيٍّ، حَدَّثَنَا يَزِيدُ، - يَعْنِي ابْنَ زُرَيْعٍ - عَنْ رَوْحِ بْنِ الْقَاسِمِ، حَدَّثَنَا أَيُّوبُ بْنُ مُوسَى، بِهَذَا الإِسْنَادِ وَقَالَ أَفَأَحُلُّهُ فَأَغْسِلُهُ مِنَ الْجَنَابَةِ ‏.‏ وَلَمْ يَذْكُرِ الْحَيْضَةَ ‏.‏
Reference : Sahih Muslim 330c
In-book reference : Book 3, Hadith 68
USC-MSA web (English) reference : Book 3, Hadith 645
  (deprecated numbering scheme)