Al-Kāfi - Volume 6 > Eating Clay
Hadith #6

مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ الْحَكَمِ عَنْ إِسْمَاعِيلَ بْنِ مُحَمَّدٍ عَنْ جَدِّهِ زِيَادِ بْنِ أَبِي زِيَادٍ عَنْ أَبِي جَعْفَرٍ ( عليه السلام ) قَالَ إِنَّ التَّمَنِّيَ عَمَلُ الْوَسْوَسَةِ وَ أَكْثَرُ مَصَائِدِ الشَّيْطَانِ أَكْلُ الطِّينِ وَ هُوَ يُورِثُ السُّقْمَ فِي الْجِسْمِ وَ يُهَيِّجُ الدَّاءَ وَ مَنْ أَكَلَ طِيناً فَضَعُفَ عَنْ قُوَّتِهِ الَّتِي كَانَتْ قَبْلَ أَنْ يَأْكُلَهُ وَ ضَعُفَ عَنِ الْعَمَلِ الَّذِي كَانَ يَعْمَلُهُ قَبْلَ أَنْ يَأْكُلَهُ حُوسِبَ عَلَى مَا بَيْنَ قُوَّتِهِ وَ ضَعْفِهِ وَ عُذِّبَ عَلَيْهِ .

6. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn al-Hakam from Ysma‘il ibn Muhammad from his grandfather Ziyad ibn abu Ziyad who has said the following: “Abu Ja‘far, ‘Alayhi al-Salam, has said, ‘Wishing and longing is an act of Satan. Eating clay is of the greater part of the hunting devices of Satan. It causes illness in the body and accelerates pain. If one because of eating clay loses his power that he had before eating clay and fails to work as he did before eating clay he will be made to suffer proportionate to the amount of power that he had lost because of eating clay.’”