that he heard the Messenger of Allah ﷺ say: "In the black seed there is healing for every disease except sam." al-sam means death, and the black seed is shuniz.

أَنَّهُ سَمِعَ رَسُولَ اللَّهِ ﷺ يَقُولُ: «إِنَّ فِي الْحَبَّةِ السَّوْدَاءِ شِفَاءً مِنْ كُلِّ دَاءٍ إِلاَّ السَّامَ». وَالسَّامُ: الْمَوْتُ، وَالْحَبَّةُ السَّوْدَاءُ: الشُّونِيزُ.

that the Messenger of Allah ﷺ said, "Use this black seed, for in it there is healing from every disease except death."

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ: «عَلَيْكُمْ بِهَذِهِ الْحَبَّةِ السَّوْدَاءِ، فَإِنَّ فِيهَا شِفَاءً مِنْ كُلِّ دَاءٍ إِلاَّ السَّامَ.»

We went out, and with us was Ghalib b. Abjar. He fell ill on the way, and we came to Madinah while he was ill. Ibn Abu Atiq visited him and said to us, "Use this black seed. Take five or seven of them, grind them, then drip it into his nose with drops of oil, on this side and on this side; for Aishah told them that she heard the Messenger of Allah ﷺ say: "Indeed, this black seed is a cure for every disease, unless it is sam."" I said, "What is al-sam?" He said, "Death."

خَرَجْنَا وَمَعَنَا غَالِبُ بْنُ أَبْجَرَ، فَمَرِضَ فِي الطَّرِيقِ، فَقَدِمْنَا الْمَدِينَةَ وَهُوَ مَرِيضٌ، فَعَادَهُ ابْنُ أَبِي عَتِيقٍ، وَقَالَ لَنَا: عَلَيْكُمْ بِهَذِهِ الْحَبَّةِ السَّوْدَاءِ، فَخُذُوا مِنْهَا خَمْسًا أَوْ سَبْعًا، فَاسْحَقُوهَا، ثُمَّ اقْطُرُوهَا فِي أَنْفِهِ بِقَطَرَاتِ زَيْتٍ، فِي هَذَا الْجَانِبِ وَفِي هَذَا الْجَانِبِ؛ فَإِنَّ عَائِشَةَ حَدَّثَتْهُمْ أَنَّهَا سَمِعَتْ رَسُولَ اللَّهِ ﷺ يَقُولُ: «إِنَّ هَذِهِ الْحَبَّةَ السَّوْدَاءَ شِفَاءٌ مِنْ كُلِّ دَاءٍ، إِلَّا أَنْ يَكُونَ السَّامُ». قُلْتُ: وَمَا السَّامُ؟ قَالَ: الْمَوْتُ.