مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ أَبِي يَحْيَى الْوَاسِطِيِّ عَنْ رَجُلٍ قَالَ قَالَ أَبُو عَبْدِ اللَّهِ ( عليه السلام ) الطِّينُ حَرَامٌ كُلُّهُ كَلَحْمِ الْخِنْزِيرِ وَ مَنْ أَكَلَهُ ثُمَّ مَاتَ فِيهِ لَمْ أُصَلِّ عَلَيْهِ إِلَّا طِينَ الْقَبْرِ فَإِنَّ فِيهِ شِفَاءً مِنْ كُلِّ دَاءٍ وَ مَنْ أَكَلَهُ لِشَهْوَةٍ لَمْ يَكُنْ لَهُ فِيهِ شِفَاءٌ .
1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from abu Yahya al-Wasitiy from a man who has said the following: “Abu ‘ Abd Allah , has said, ’Eating clay is unlawful in its entirety, like the flesh of pork. If one eats it and dies, I will not perform Salat (prayer) for him except the clay from the grave (of al-Husayn  ) in which there is cure for all kinds of illnesses but if one eats it because of strong desire, then there is no cure in it.’” 