صَحِيحُ مُسْلِمٍ
Sahih Muslim 332 d
The Book of Menstruation
It is recommended for the woman who is performing ghusl following menses to apply a piece of cloth scented with musk to the site of the bleeding
وَحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، فِي هَذَا الإِسْنَادِ نَحْوَهُ وَقَالَ قَالَ سُبْحَانَ اللَّهِ تَطَهَّرِي بِهَا . وَاسْتَتَرَ .
This hadith is narrated by 'Ubaidullah b. Mu'adh with the same chain of transmitters (but for the words) that he (the Prophet) said: Cleanse yourself with it, and he covered (his face on account of shyness).
Sahih Muslim, 332 dSahihصحيح