Musnad Ahmad Hadith 14059

It is narrated from Anas (may Allah be pleased with him) that when the Prophet (ﷺ) intended to have his head shaved (on the occasion of the Farewell Pilgrimage), Abu Talha (may Allah be pleased with him) took some hair from one part of his head in his hands, then those hairs were taken by Umm Sulaym, who would mix them in her perfume and shake it. Also, the Prophet (ﷺ) used to go to the house of Umm Sulaym (may Allah be pleased with her) and rest on a leather bed, upon which he would sweat a lot. One day, when the Prophet (ﷺ) came, she began to collect his sweat in a bottle. The Prophet (ﷺ) woke up and said, "O Umm Sulaym! What are you doing?" She replied, "O Messenger of Allah! I will mix your sweat in my perfume."