Through this chain of narration, from Muhammad ibn Ya’qub, from Ali ibn Ibrahim, from his father, from Ibn Abi Umayr, from Muhammad ibn Sukayn and others, from Abu Abdullah عليه السلام, who said: It was mentioned to Imam عليه السلام that a certain man, who had become junub and was afflicted with smallpox, was made to perform ghusl, and he died as a result. Imam عليه السلام said: "They killed him! Why did they not ask? Why did they not let him perform tayammum? The cure for ignorance is asking questions." It is also narrated regarding a person with fractures or severe illness that: Imam عليه السلام said: "He should perform tayammum and not perform ghusl."