If one forgets the second prostration and remembers it after the taslim, what is required of him?
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The questioner : Peace be upon you.
The Shaykh : Peace be upon you and Allah's mercy.
The questioner : How are you, Shaykh?
The Shaykh : Good, and praise be to Allah.
The questioner : We love you for the sake of Allah, if Allah wills.
The Shaykh : May Allah love you for the sake of which you loved us.
The questioner : I have three simple questions. The first question is: The imam prayed with the congregation and forgot one of the two prostrations in the last rak'ah?
The Shaykh : Hmm?
The questioner : He forgot the last prostration in the last rak'ah; he only prostrated once.
The Shaykh : Yes.
The questioner : In this situation, I mean, I would like to seek your guidance.
The Shaykh : The second prostration. We prostrate the second prostration. Yes. Yes.
The questioner : He was reminded after the taslim.
The Shaykh : Yes.
The questioner : If he goes down for the second prostration and then says the taslim.
The Shaykh : Then he remembers after the taslim, he returns to his prayer, sits in the position between the two prostrations, and says, "My Lord, forgive me," then he prostrates the second prostration, then he stands up and recites the final tashahhud, and says the taslim, then he prostrates two prostrations after the taslim.
The questioner : He repeats only the prostration.
The Shaykh : Yes, he does not repeat anything except the prostration.
The presenter : May Allah reward you.
The Shaykh : Some scholars say that if he remembers after the taslim, he repeats the entire rak'ah. This is a weak opinion with no basis. Yes.
The questioner : Yes.
The Shaykh : Peace be upon you and Allah's mercy.
The questioner : How are you, Shaykh?
The Shaykh : Good, and praise be to Allah.
The questioner : We love you for the sake of Allah, if Allah wills.
The Shaykh : May Allah love you for the sake of which you loved us.
The questioner : I have three simple questions. The first question is: The imam prayed with the congregation and forgot one of the two prostrations in the last rak'ah?
The Shaykh : Hmm?
The questioner : He forgot the last prostration in the last rak'ah; he only prostrated once.
The Shaykh : Yes.
The questioner : In this situation, I mean, I would like to seek your guidance.
The Shaykh : The second prostration. We prostrate the second prostration. Yes. Yes.
The questioner : He was reminded after the taslim.
The Shaykh : Yes.
The questioner : If he goes down for the second prostration and then says the taslim.
The Shaykh : Then he remembers after the taslim, he returns to his prayer, sits in the position between the two prostrations, and says, "My Lord, forgive me," then he prostrates the second prostration, then he stands up and recites the final tashahhud, and says the taslim, then he prostrates two prostrations after the taslim.
The questioner : He repeats only the prostration.
The Shaykh : Yes, he does not repeat anything except the prostration.
The presenter : May Allah reward you.
The Shaykh : Some scholars say that if he remembers after the taslim, he repeats the entire rak'ah. This is a weak opinion with no basis. Yes.
The questioner : Yes.
Source
قناة «فضيلة الشيخ محمد بن صالح العثيمين»، 364- من نسي السجود الثاني وتذكر بعد السلام ماذا عليه/سؤال على الهاتف 📞 /ابن عثيمين — youtube.com
The Arabic text is a machine transcription of the audio recording.