Anas bin Malik reported,

The Prophet ﷺ used to take his afternoon nap at the home of Umm Sulaym. He was among the people who perspired most heavily, so she prepared a leather mat for him on which he would nap, and she stitched a line between his legs. She would soak up his sweat and collect it.He asked, "What is this, Umm Sulaym?"She replied, "It is your sweat, Messenger of Allah. I add it to my perfume."So he made a beautiful supplication for her.

Ahmad 13423

Sahih

حدثنا إسحاق بن منصور يعني السلولي حدثنا عمارة يعني ابن زاذان عن ثابت

عن أنس قال

كان النبي ﷺ يقيل عند أم سليم وكان من أكثر الناس عرقا فاتخذت له نطعا فكان يقيل عليه وخطت بين رجليه خطا فكانت تنشف العرق فتأخذه فقال ما هذا يا أم سليم فقالت عرقك يا رسول الله أجعله في طيبي فدعا لها بدعاء حسن

أحمد 13423صحيح
Contents
Reference
Commentary
Ayat
Collection
Musnad Ahmad
Book
Anas bin Malik
Numbering
Darussalam 13423
Ahmad 13423