I heard the Messenger of Allah ﷺ say about black seed, "You should use this black seed, for it contains a cure for every disease except as-sam," meaning death.
حدثنا عبد الرزاق أخبرنا معمر عن الزهري أخبرني أبو سلمة
سمعت رسول الله ﷺ يقول للشونيز عليكم بهذه الحبة السوداء فإن فيها شفاء من كل شيء إلا السام يريد الموت
Its isnad is sahih. It has already appeared as 7285
, narrated by Sufyan, from Zuhri, from Abu Salama, and as
7548
, narrated by Muhammad bin Amr, from Abu Salama.