Mishkat al-Masabih 23 Medicine and Spells كتاب الطب والرقى 7

وَعَن أَبِي هُرَيْرَةَ أَنَّهُ سَمِعَ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَقُولُ: «فِي الْحَبَّةِ السَّوْدَاءِ شِفَاءٌ مِنْ كُلِّ دَاءٍ إِلَّا السَّامَ» . قَالَ ابْنُ شِهَابٍ: السَّامُ: الْمَوْتُ وَالْحَبَّةُ السَّوْدَاءُ: الشُّونِيزُ

Aba Huraira told of hearing God’s messenger say: “Nigella seed is a remedy for every disease but sam .” Ibn Shihab said sant is death and the nigella seed is shuniz .* (Bukhari and Muslim.) * Taj al-’arus says this is a Persian word which came to be used by Arabs. It indicates a seed of a species of nigella.