The Messenger of Allah ﷺ used to visit Umm Sulaym, and she would spread out a leather mat for him on which he would take his afternoon nap. She would collect drops of his sweat and add them to her perfume. She would also spread out a small prayer mat for him on which he would pray.
حدثنا عبد الوهاب بن عبد المجيد عن أيوب عن أنس بن سيرين
كان رسول الله ﷺ يدخل على أم سليم فتبسط له نطعا فيقيل عليه فتأخذ من عرقه فتجعله في طيبها وتبسط له الخمرة فيصلي عليها
No references are available.
Its isnad is sahih. Ayub is Ayub Sikhtiyani. Bukhari narrated the hadith with similar wording in 11/70, no. 6281, Fath al-Bari, in the chapter on seeking permission, on one who visits a people and stays overnight with them. Shafii narrated it in Musnad, no. 176 and 296, and Bayhaqi in Dalail, 1/158.