The ruling on the prayer of the one who stands up before the imam completes the second taslim
Machine translationRead the Arabic original
The questioner : People must choose the second or third [rak'ah] after the imam has said the first taslim, before the second taslim in the qiyam.
The Shaykh : Yes.
The questioner : Yes.
The Shaykh : They prohibit this, but the invalidation does not invalidate the prayer, because many of the people of knowledge say that if he says the first taslim, the prayer has ended. For this reason, the madhhab in this issue says that his prayer is not invalidated, but it becomes a nafilah, because the nafilah is concluded with a single taslim, so it becomes a nafilah. However, the correct view is that it does not become a nafilah, but rather this act is prohibited.
The Shaykh : Yes.
The questioner : Yes.
The Shaykh : They prohibit this, but the invalidation does not invalidate the prayer, because many of the people of knowledge say that if he says the first taslim, the prayer has ended. For this reason, the madhhab in this issue says that his prayer is not invalidated, but it becomes a nafilah, because the nafilah is concluded with a single taslim, so it becomes a nafilah. However, the correct view is that it does not become a nafilah, but rather this act is prohibited.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 443 - حكم قيام المصلي قبل تسليم الإمام التسليمة الثانية - قواعد ابن رجب - ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.