When the Messenger of Allah ﷺ wished for the barber to shave his head, Abu Talha took hold of the hair on one side of his head with his hand. He gathered the hair and brought it to Umm Sulaym, and she would mix it into her perfume.
لما أراد رسول الله ﷺ أن يحلق الحجام رأسه، أخذ أبو طلحة بشعر أحد شقي رأسه بيده، فأخذ شعره، فجاء به إلى أم سليم، قال: فكانت أم سليم تدوفه في طيبها.
Imam Ahmad narrated it (12683) from Hasan (bin Musa), Hammad bin Salama narrated to us, from Thabit Bunani, from Anas, and he related it.As for his saying, "she mixes it into her perfume," it means she blends it into it. It is said, "daafahu bimaa yaduufuhu wa yadeefuhu," when one moistens something with water and mixes it in.