Musnad Ahmad 30:520

'Abd al-Razzaq narrated to us, Ma'mar informed us, from al-Zuhri, Abu Salamah informed me, from Abu Hurayrah, who said: I heard the Messenger of Allah, peace and blessings of Allah be upon him, say regarding the *shuniz* (black seed): "You must use this black seed, for indeed in it is a cure for every disease, except the *sam*." He meant death.