there is a healing and cure in the soil of Imam Hussein's grave

في طِينِ قَبْرِ الْحُسَيْنِ عليه السلام الشِّفَاءُ مِنْ كُلِّ دَاءٍ، وَهُوَ الدَّوَاءُ الْأَكْبَرُ.

Imam Sadiq (as): there is a healing and cure in the soil of Imam Hussein's grave for all ailments and diseases and it is the greatest medicine                             

Kamil al-Ziyarat