The Complete Pilgrimage Guide · Hadith 649 (#Ḥadīth #3)
Chapter 95 | Eating from any Clay is Unlawful Except the Clay of the Grave of Ĥusain , For Verily It Is the Cure
3 حَدَّثَنِي أَبُو عَبْدِ اللَّهِ مُحَمَّدُ بْنُ أَحْمَدَ بْنِ يَعْقُوبَ عَنْ عَلِيِّ بْنِ الْحَسَنِ بْنِ عَلِيِّ بْنِ فَضَّالٍ عَنْ أَبِيهِ عَنْ بَعْضِ أَصْحَابِنَا عَنْ أَحَدِهِمَا (ع) قَالَ إِنَّ اللَّهَ تَبَارَكَ وَ تَعَالَى خَلَقَ آدَمَ (ع) مِنْ طِينٍ فَحَرَّمَ الطِّينَ عَلَى وُلْدِهِ قَالَ فَقُلْتُ مَا تَقُولُ فِي طِينِ قَبْرِ الْحُسَيْنِ (ص) فَقَالَ يَحْرُمُ عَلَى النَّاسِ أَكْلُ لُحُومِهِمْ وَ يَحُلُّ عَلَيْهِمْ أَكْلُ لُحُومِنَا- وَ لَكِنِ الشَّيْءُ الْيَسِيرُ مِنْهُ مِثْلُ الْحِمَّصَةِ
3. Abū ‘Abdillāh Muḥammad ibn Aḥmad ibn Ya’qūb narrated to me from ‘Ali ibn Ḥasan ibn ‘Ali ibn Faďďāl, from his father, from some of our companions, who said: Abū Ja’far (Imam Bāqir ) or Abū ‘Abdillāh (Imam Sādiq ) said: Verily Allāh, the Blessed and the Exalted, created Ādam from clay. Therefore, He forbade (eating) clay on the children of Ādam (mankind). I asked, “What about (eating some of) the clay of the grave of Ḥusain ?” Imam replied, “It is unlawful for people to eat their own flesh but is it permissible for them to eat our flesh?!!! It is permissible to eat a very little amount from it, as much as a chick-pea.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).