Musnad Ahmad 30:1935

'Affan narrated to us, 'Abd al-Rahman ibn Ibrahim al-Qass narrated to us, he said: al-'Ala' ibn 'Abd al-Rahman narrated to us, from his father, from Abu Hurayrah, from the Messenger of Allah, peace and blessings of Allah be upon him, he said: "There is no disease except that in the black seed there is a cure for it, except for the Sam (death)."