The ruling on the prayer of the ma'mum (one praying behind the imam) if the imam prays while having ritual impurity on him that he is unaware of
Machine translationRead the Arabic original
The questioner : What do you say about the madhhab (school of jurisprudence) in this issue?
The Shaykh : Yes.
The questioner : It came to me from a mosque.
The Shaykh : The issue is if the imam prays while having ritual impurity on him that he is unaware of, and the ma'mum knows about it.
The questioner : And they mentioned it to the organizer; the organizer must alert the imam.
The Shaykh : He did not alert him.
The questioner : If he did not alert him, is the imam's prayer valid or invalid?
The Shaykh : I want to know according to the madhhab.
The questioner : According to whom? A word about the prayer.
The Shaykh : Yes, indeed, it is valid. The second opinion, as the brother said, is that both their prayers are valid, because the imam was ignorant, and the ma'mum followed an imam whose prayer is valid in the ma'mum's view.
The Shaykh : Yes.
The questioner : It came to me from a mosque.
The Shaykh : The issue is if the imam prays while having ritual impurity on him that he is unaware of, and the ma'mum knows about it.
The questioner : And they mentioned it to the organizer; the organizer must alert the imam.
The Shaykh : He did not alert him.
The questioner : If he did not alert him, is the imam's prayer valid or invalid?
The Shaykh : I want to know according to the madhhab.
The questioner : According to whom? A word about the prayer.
The Shaykh : Yes, indeed, it is valid. The second opinion, as the brother said, is that both their prayers are valid, because the imam was ignorant, and the ma'mum followed an imam whose prayer is valid in the ma'mum's view.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 3256إذا صلى الإمام وعليه نجاسة لا يعلم بها وعلم بها...؟📔 الشرح الممتع على زاد المستقنع - ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.