What is the ruling if the imam stands for a fifth rak'ah?
Machine translationRead the Arabic original
Question:
Honorable Shaykh, the questioner says: If the imam stands for a fifth rak'ah in the Zuhr prayer, what should we do in this situation?
Answer:
If you know that it is the fifth rak'ah, it is forbidden for you to stand; you should sit. Either you recite the tashahhud, or you wait for him to say the taslim, or you say the taslim yourself. It is not permissible for you to stand with him while you know that it is the fifth rak'ah. If you do stand, your prayer is invalid because you intentionally added to it, which invalidates it. Yes.
Honorable Shaykh, the questioner says: If the imam stands for a fifth rak'ah in the Zuhr prayer, what should we do in this situation?
Answer:
If you know that it is the fifth rak'ah, it is forbidden for you to stand; you should sit. Either you recite the tashahhud, or you wait for him to say the taslim, or you say the taslim yourself. It is not permissible for you to stand with him while you know that it is the fifth rak'ah. If you do stand, your prayer is invalid because you intentionally added to it, which invalidates it. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، ما العمل إذا قام الإمام لركعة خامسة؟ للشيخ صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.