Musnad Ahmad 1153:2284

'Ubaydah narrated to us, he said: Mansur narrated to me, from Ibrahim, from al-Aswad, from 'Aishah, she said: "It is as if I am looking at the glistening of the perfume on the head of the Messenger of Allah, may Allah bless him and grant him peace, while he was in the state of ihram."