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 ‏

'Uthman b. 'Urwa reported on the authority of his father that he said:

I asked 'A'isha with what thing she perfumed the Messenger of Allah (ﷺ) at the time of entering upon the state of Ihram. She said: With the best of perfume.
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَزُهَيْرُ بْنُ حَرْبٍ، جَمِيعًا عَنِ ابْنِ عُيَيْنَةَ، - قَالَ زُهَيْرٌ حَدَّثَنَا سُفْيَانُ، - حَدَّثَنَا عُثْمَانُ بْنُ عُرْوَةَ، عَنْ أَبِيهِ، قَالَ سَأَلْتُ عَائِشَةَ - رضى الله عنها - بِأَىِّ شَىْءٍ طَيَّبْتِ رَسُولَ اللَّهِ صلى الله عليه وسلم عِنْدَ حِرْمِهِ قَالَتْ بِأَطْيَبِ الطِّيبِ‏.‏
Reference : Sahih Muslim 1189 f
In-book reference : Book 15, Hadith 39
USC-MSA web (English) reference : Book 7, Hadith 2685
  (deprecated numbering scheme)