Sahih Muslim Book - 43, Hadith - 6057

حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ ، حَدَّثَنَا عَفَّانُ بْنُ مُسْلِمٍ ، حَدَّثَنَا وُهَيْبٌ ، حَدَّثَنَا أَيُّوبُ ، عَنْ أَبِي قِلاَبَةَ ، عَنْ أَنَسٍ ، عَنْ أُمِّ سُلَيْمٍ ، أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَأْتِيهَا فَيَقِيلُ عِنْدَهَا فَتَبْسُطُ لَهُ نِطْعًا فَيَقِيلُ عَلَيْهِ ، وَكَانَ كَثِيرَ الْعَرَقِ ، فَكَانَتْ تَجْمَعُ عَرَقَهُ فَتَجْعَلُهُ فِي الطِّيبِ وَالْقَوَارِيرِ ، فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ : يَا أُمَّ سُلَيْمٍ مَا هَذَا ؟ قَالَتْ : عَرَقُكَ أَدُوفُ بِهِ طِيبِي.

It was narrated from Umm Sulaim that the Prophet (s.a.w) used to come to her and take a nap in her house. She would spread a piece of cloth for him and he would sleep on it. He used to sweat a great deal, and she would collect his sweat and put it in her perfume bottles. The Prophet (s.a.w) said: “O Umm Sulaim, what is this?” She said: “Your sweat; I put it in my perfume.”