He said God’s messenger often greased his head and combed his beard, and he often wore a head veil as though his garment (the explanation which seems to be preferred is that the word "garment’’ here refers to the cloth like a veil which was used to protect the turban from the grease.) were that of an olive-oil seller. It is transmitted in Sharh as sunna.
Hadith Referenceمشكوة المصابيح / كتاب اللباس / 4445
Hadith Gradingالألبانی:لم تتمّ دراسته | زبیر علی زئی:إسناده ضعيف
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «إسناده ضعيف، رواه البغوي في شرح السنة (82/12 ح 3164) [و الترمذي في الشمائل (125، 33) ] ٭ فيه يزيد بن أبان الرقاشي: ضعيف مشھور .»