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. (PT)
English reference (PT): Vol. 4, Book 25, Hadith 3083 (PT)
Arabic reference (PT): Book 25, Hadith 3201 (PT)