The meaning of the clay of lunacy

2. We were told by Muhammed bin Hasan bin Ahmad, may Allah grant him mercy, that he said: We were told by Muhammed bin Hasan al-Saffar, from Ahmad bin Abi Abdillah, from his father, from Ibn Abi ‘Umayr, from Mahran bin Muhammed, from Sa’d al-Iskafi, from Abu Ja’far, peace be upon him, that he said: The one who drinks wine or an intoxicant, his prayer will not be accepted for forty mornings, and if he returns, Allah will make him drink from the clay of lunacy.