Sahih al-Bukhari 5687
Narrated Khalid bin Sa`d:
We went out and Ghalib bin Abjar was accompanying us. He fell ill on the way and when we arrived 
at Medina he was still sick. Ibn Abi 'Atiq came to visit him and said to us, "Treat him with black 
cumin. Take five or seven seeds and crush them (mix the powder with oil) and drop the resulting 
mixture into both nostrils, for `Aisha has narrated to me that she heard the Prophet (ﷺ) saying, 'This black 
cumin is healing for all diseases except As-Sam.' Aisha said, 'What is As-Sam?' He said, 'Death."
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ، حَدَّثَنَا إِسْرَائِيلُ، عَنْ مَنْصُورٍ، عَنْ خَالِدِ بْنِ سَعْدٍ، قَالَ خَرَجْنَا وَمَعَنَا غَالِبُ بْنُ أَبْجَرَ فَمَرِضَ فِي الطَّرِيقِ، فَقَدِمْنَا الْمَدِينَةَ وَهْوَ مَرِيضٌ، فَعَادَهُ ابْنُ أَبِي عَتِيقٍ فَقَالَ لَنَا عَلَيْكُمْ بِهَذِهِ الْحُبَيْبَةِ السَّوْدَاءِ، فَخُذُوا مِنْهَا خَمْسًا أَوْ سَبْعًا فَاسْحَقُوهَا، ثُمَّ اقْطُرُوهَا فِي أَنْفِهِ بِقَطَرَاتِ زَيْتٍ فِي هَذَا الْجَانِبِ وَفِي هَذَا الْجَانِبِ، فَإِنَّ عَائِشَةَ حَدَّثَتْنِي أَنَّهَا سَمِعَتِ النَّبِيَّ صلى الله عليه وسلم يَقُولُ ‏
"‏ إِنَّ هَذِهِ الْحَبَّةَ السَّوْدَاءَ شِفَاءٌ مِنْ كُلِّ دَاءٍ إِلاَّ مِنَ السَّامِ ‏"‏‏.‏ قُلْتُ وَمَا السَّامُ قَالَ الْمَوْتُ‏.‏