Musnad Ahmad 32:1437

Yunus and Hasan ibn Musa narrated to us, they said: Hammad ibn Salamah narrated to us, from Thabit, from Anas ibn Malik, who said: "The Messenger of Allah (peace and blessings of Allah be upon him) was of a radiant complexion, as if his sweat were pearls. When he walked, he would lean forward. I have never touched brocade nor silk softer than the palm of the Messenger of Allah (peace and blessings of Allah be upon him), and I have never smelled a scent of musk nor ambergris more fragrant than the scent of the Messenger of Allah (peace and blessings of Allah be upon him)." Hasan said: "A piece of musk nor a piece of ambergris."