4. Samā’ah ibn Mihrān narrated that: Abū ‘Abdillāh (Imam Sādiq عليه السلام) said: (Eating from) any clay is unlawful for mankind except (eating from) the clay of the grave of Ḥusain عليه السلام. Allāh, the Exalted, will cure those who eat from it to treat an illness.