Mishkat al-Masabih

‘A’isha said : I used to perfume God’s messenger with a perfume containing musk preparatory to his entering the sacred state before he put on the ihram, and when he put off the ihram, before he made the circuits round the House. I still seem to see the glistening of the perfume where the hair was parted on God’s messenger’s head while he was wearing the ihram. Bukhari and Muslim.