Chapter on Description of Tayammum, Its Rules for Those in a State of Impurity, and What They Should Observe About Istibra and Istizhar

Then, the Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, said: "If the source of impurity is defecation, one purifies himself using three clean stones that have not been previously used for removing impurity. He takes one stone, wipes the affected area, and discards it, then takes a second stone, wipes the area, and discards it, and finally uses a third stone, ensuring to follow the areas of visible impurity and remove them with the stones. It is not permissible to purify oneself with just one stone. After that, one performs Tayammum as we have described - striking the soil with the palms of the hands and wiping the face and the backs of the palms. By doing so, the state of impurity is removed, as we have previously explained." All of this has been explained in detail earlier, and it further emphasizes the matter.