كتاب الحج
15  
The Book of Pilgrimage
(1)
Chapter: What one who has entered Ihram for Hajj or Umrah is permitted to wear, and what is not permissible, and perfume is forbidden for him
(1)
باب مَا يُبَاحُ لِلْمُحْرِمِ بِحَجٍّ أَوْ عُمْرَةٍ وَمَا لاَ يُبَاحُ وَبَيَانِ تَحْرِيمِ الطِّيبِ عَلَيْهِ
Sahih Muslim 1180 b

Safwan b. Ya'la reported on the authority of his father (who said):

A person came to the Messenger of Allah (ﷺ) as he was staying at Ji'rana and I (the narrator's father) was at that time in the apostle's (ﷺ) company and (the person) was donning a cloak having the marks of perfume on it, and he said: I am in a state of Ihram for the sake of Umra, and it (this cloak) is upon me and I am perfumed. The Apostle of Allah (ﷺ) said to him: What would you do in your Hajj? He said: I would take off the clothes and would wash from me this perfume. Thereupon the Messenger of Allah (ﷺ) said: What you do in your Hajj do it in your Umra.
وَحَدَّثَنَا ابْنُ أَبِي عُمَرَ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنْ عَمْرٍو، عَنْ عَطَاءٍ، عَنْ صَفْوَانَ بْنِ، يَعْلَى عَنْ أَبِيهِ، قَالَ أَتَى النَّبِيَّ صلى الله عليه وسلم رَجُلٌ وَهُوَ بِالْجِعْرَانَةِ وَأَنَا عِنْدَ النَّبِيِّ صلى الله عليه وسلم وَعَلَيْهِ مُقَطَّعَاتٌ - يَعْنِي جُبَّةً - وَهُوَ مُتَضَمِّخٌ بِالْخَلُوقِ فَقَالَ إِنِّي أَحْرَمْتُ بِالْعُمْرَةِ وَعَلَىَّ هَذَا وَأَنَا مُتَضَمِّخٌ بِالْخَلُوقِ ‏.‏ فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم ‏"‏ مَا كُنْتَ صَانِعًا فِي حَجِّكَ ‏"‏ ‏.‏ قَالَ أَنْزِعُ عَنِّي هَذِهِ الثِّيَابَ وَأَغْسِلُ عَنِّي هَذَا الْخَلُوقَ ‏.‏ فَقَالَ لَهُ النَّبِيُّ صلى الله عليه وسلم ‏"‏ مَا كُنْتَ صَانِعًا فِي حَجِّكَ فَاصْنَعْهُ فِي عُمْرَتِكَ ‏"‏ ‏.‏
Reference : Sahih Muslim 1180b
In-book reference : Book 15, Hadith 9
USC-MSA web (English) reference : Book 7, Hadith 2655
  (deprecated numbering scheme)