Musnad Ahmad 214:1

Abu Ahmad al-Zubayri narrated to us, Abu al-Nu'man 'Abd al-Rahman ibn al-Nu'man al-Ansari narrated to us, from his father, from his grandfather—and he had met the Prophet, peace and blessings of Allah be upon him—who said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Apply kohl with scented ithmid (antimony), for it clears the vision and makes the hair grow."