كتاب الحج
15  
The Book of Pilgrimage
(7)
Chapter: It is recommended to apply perfume just before entering Ihram, and it is recommended to use Musk, and it does not matter if its glistening traces remain
(7)
باب الطِّيبِ لِلْمُحْرِمِ عِنْدَ الإِحْرَامِ ‏
Sahih Muslim 1189 b

'A'isha (Allah be pleased with her), the wife of the Messenger of Allah (ﷺ), reported:

I applied perfume to the Messenger of Allah (ﷺ) with my own hand before he entered upon the state of Ihram, and as he concluded it before circumambulating the House (for Tawaf-i-lfada).
وَحَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، حَدَّثَنَا أَفْلَحُ بْنُ حُمَيْدٍ، عَنِ الْقَاسِمِ بْنِ مُحَمَّدٍ، عَنْ عَائِشَةَ، - رضى الله عنها - زَوْجِ النَّبِيِّ صلى الله عليه وسلم قَالَتْ طَيَّبْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم بِيَدِي لِحُرْمِهِ حِينَ أَحْرَمَ وَلِحِلِّهِ حِينَ أَحَلَّ قَبْلَ أَنْ يَطُوفَ بِالْبَيْتِ‏.‏
Reference : Sahih Muslim 1189b
In-book reference : Book 15, Hadith 35
USC-MSA web (English) reference : Book 7, Hadith 2681
  (deprecated numbering scheme)