Musnad Ahmad 1153:917

He said: Affan narrated to us, Hammad ibn Salamah narrated to us, he said: Hammad informed us, from Ibrahim, from al-Aswad, from Aisha, she said: "It is as if I am looking at the glistening of the perfume in the parting of the hair of the Prophet, may Allah bless him and grant him peace, after days, while he was in the state of ihram."