Imam Abu Bakr (may Allah have mercy on him) says that the evidence for this issue has already been mentioned by me at the beginning of the book under the chapter "Applying perfume when in the state of Ihram," in the narration of Mansur bin Zadhan from Abdur Rahman bin Qasim.
Hadith Referenceصحيح ابن خزيمه / جماع أبواب ذكر أفعال اختلف الناس فى إباحته للمحرم، نصت سنة النبى صلى الله عليه وسلم أو دلت على إباحتها / 2935