It is narrated from Sayyidah Umm Sulaym (may Allah be pleased with her); she said: "The Messenger of Allah (peace and blessings be upon him) used to take his midday rest (qaylulah) at my house. I would spread out a leather mat for him (peace and blessings be upon him), and he (peace and blessings be upon him) would rest on it and sweat, and I used to knead musk with that sweat to make perfume." Muhammad bin Sirin said: I asked Umm Sulaym (may Allah be pleased with her) for some of that musk, and she gave me some of it. Then when Muhammad (bin Sirin) died, he was embalmed (hanut) with that very musk, and Muhammad used to like the deceased to be embalmed with musk.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21752