كتاب الفضائل
43  
The Book of Virtues
(22)
Chapter: The Fragrance Of His Sweat, And Seeking Blessing Therefrom
(22)
باب طِيبِ عَرَقِ النَّبِيِّ صلى الله عليه وسلم وَالتَّبَرُّكِ بِهِ ‏.‏
Sahih Muslim 2331 a

Anas b. Malik reported that Allah's Apostle (ﷺ) used to come to our house and there was perspiration upon his body. My mother brought a bottle and began to pour the sweat in that. When Allah's Apostle (ﷺ) got up he said:

Umm Sulaim, what is this that you are doing? Thereupon she said: That is your sweat which we mix in our perfume and it becomes the most fragrant perfume.
حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا هَاشِمٌ، - يَعْنِي ابْنَ الْقَاسِمِ - عَنْ سُلَيْمَانَ، عَنْ ثَابِتٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ دَخَلَ عَلَيْنَا النَّبِيُّ صلى الله عليه وسلم فَقَالَ عِنْدَنَا فَعَرِقَ وَجَاءَتْ أُمِّي بِقَارُورَةٍ فَجَعَلَتْ تَسْلُتُ الْعَرَقَ فِيهَا فَاسْتَيْقَظَ النَّبِيُّ صلى الله عليه وسلم فَقَالَ ‏ "‏ يَا أُمَّ سُلَيْمٍ مَا هَذَا الَّذِي تَصْنَعِينَ ‏"‏ ‏.‏ قَالَتْ هَذَا عَرَقُكَ نَجْعَلُهُ فِي طِيبِنَا وَهُوَ مِنْ أَطْيَبِ الطِّيبِ ‏.‏
Reference : Sahih Muslim 2331a
In-book reference : Book 43, Hadith 113
USC-MSA web (English) reference : Book 30, Hadith 5761
  (deprecated numbering scheme)