It wasnarrated from Ibn 'Umar that the Prophet (ﷺ) used to put oilonhis head when he was in the state of Ihram, but not oil that wasperfumed. (FR)
English reference (FR): Vol. 4, Book 25, Hadith 3083 (FR)
Arabic reference (FR): Book 25, Hadith 3201 (FR)