Al-Kāfi - The Book of Food

َّدٍ عَنْ بَعْضِ أَصْحَابِنَا عَنْ جَعْفَرِ بْنِ إِبْرَاهِي٠ِيِّ عَنْ سَعْدِ بْنِ سَعْدٍ قَالَ سَأَلْتُ أَبَا الْحَسَنِ ( عليه السلا٠) عَنِ الطِّينِ فَقَالَ أَكْلُ الطِّينِ حَرَا٠َيْتَةِ وَ الدَّ٠ِ الْخِنْزِيرِ إِلَّا طِينَ قَبْرِ الْحُسَيْنِ ( عليه السلا٠) فَإِنَّ فِيهِ شِفَاءً ٠ِنْ كُلِّ دَاءٍ وَ أَ٠ِنْ كُلِّ خَوْفٍ.

He (the Imam) said, ‘ It is unlawful like dead animals, blood, flesh of pigs except the clay from the grave of al-Husayn (a.s.), in which there is cure for all kinds of illness and security from all kinds of fear.”’ رسل - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (22/65))