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 1190 f

'A'isha (Allah be pleased with her) reported:

I still seem to perceive the glistening of perfume where the hair was parted on Allah's Messenger's (ﷺ) head as he was in the state of Ihram.
وَحَدَّثَنَا ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا مَالِكُ بْنُ مِغْوَلٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الأَسْوَدِ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ إِنْ كُنْتُ لأَنْظُرُ إِلَى وَبِيصِ الطِّيبِ فِي مَفَارِقِ رَسُولِ اللَّهِ صلى الله عليه وسلم وَهُوَ مُحْرِمٌ ‏.‏
Reference : Sahih Muslim 1190f
In-book reference : Book 15, Hadith 47
USC-MSA web (English) reference : Book 7, Hadith 2693
  (deprecated numbering scheme)