353 - Muhammad ibn Isma'il narrated to us, saying: Mubashir narrated to us, saying: Al-Awza'i narrated to us, from Musa ibn Yasar, from Nafi', from Ibn 'Umar, that he used to pass by water while he was deviating from the road by a mile or two, so he would perform tayammum and pray.
Chapter: A person who has performed tayammum leading those who have performed wudu in prayer.
• I said to Ahmad: Can a person who has performed tayammum lead those who have performed wudu? He said: "Ibn 'Abbas used to lead his companions in prayer while on a journey while he had performed tayammum."
354 - Al-Musayyab ibn Wadih narrated to us, saying: Abu Ishaq narrated to us, from Al-Awza'i - regarding the Imam of a group who is in a state of janaba (major ritual impurity) - he said: "He should perform tayammum and lead them in prayer. His obligatory [duty] and his concession (rukhsa) only increase him in purity."
355 - Mahmud ibn Khalid narrated to us, saying: Al-Walid narrated to us, saying: It was said to Abu 'Amr: Does the one who performed tayammum lead his companions while they are not in a state of wudu? He said: I asked Al-Zuhri about that, and he said: "I hope that this is permissible."
Chapter: If a sick person is unable to perform wudu, does he perform tayammum?
• I said to Ahmad: Does the person suffering from smallpox perform tayammum? He said: "Yes, he performs tayammum."
• And Ishaq was asked about the sick person, if he is unable to perform wudu, does he perform tayammum (1).
• I said to Ishaq: If someone suffering from stomach illness (mabtun) finds it difficult for water to touch any part of his body, does he perform tayammum? He said: "The person with stomach illness and others should perform tayammum." I said: Should someone who is with him assist him in performing tayammum? He said: "Yes."
(1) Thus it is in the original, and it is possible that there was an overlap between the question and the answer due to the eye jumping while reading.