The Complete Pilgrimage Guide · Hadith 648 (#Ḥadīth #2)
Chapter 95 | Eating from any Clay is Unlawful Except the Clay of the Grave of Ĥusain , For Verily It Is the Cure
2 حَدَّثَنِي مُحَمَّدُ بْنُ الْحَسَنِ عَنْ مُحَمَّدِ بْنِ الْحَسَنِ الصَّفَّارِ عَنْ عَبَّادِ بْنِ سُلَيْمَانَ عَنْ سَعْدِ بْنِ سَعْدٍ قَالَ سَأَلْتُ أَبَا الْحَسَنِ (ع) عَنِ الطِّينِ- قَالَ فَقَالَ أَكْلُ الطِّينِ حَرَامٌ مِثْلُ الْمَيْتَةِ وَ الدَّمِ وَ لَحْمِ الْخِنْزِيرِ إِلَّا طِينَ قَبْرِ الْحُسَيْنِ فَإِنَّ فِيهِ شِفَاءً مِنْ كُلِّ دَاءٍ وَ أَمْناً مِنْ كُلِّ خَوْفٍ
2. Muḥammad ibn Ḥasan narrated to me from Muḥammad ibn Ḥasan Al-Saffār, from ‘Abbād ibn Sulaymān, from Sa’d ibn Sa’d, who said: I asked Abal Ḥasan (Imam Riďā ) about (eating) clay. Imam replied, “Eating clay is unlawful just like MǏTAH, blood, and the flesh of a swine, except for the clay of the grave of Ḥusain , for verily it contains the cure for every disease and the protection against any fear.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).