From Sahih Bukhari (Hadith 1538):
Narrated Sa`id bin Jubair:Ibn `Umar used to oil his hair. I told that to Ibrahim who said, "What do you think about this statement: Narrated Aswad from `Aisha: As if I were now observing the glitter of the scent in the parting of the hair of the Prophet (ﷺ) while he was Muhrim?
Reference: Bukhari 1538