The ruling on one who forgets the takbir of prostration while there are people behind him: what should he do?
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The questioner : May Allah preserve you from all evil, O honorable Shaykh.
The Shaykh : And whoever heard, and whoever said, yes.
The questioner : If the imam raises his head, meaning he raises his head from prostration, but forgets to say: Allahu Akbar, what does he do in this situation?
The Shaykh : The takbirs of the prayer, other than the takbir of ihram, are obligatory. That is, if a person forgets them, his prayer is valid, but he must perform the prostration for forgetfulness before the taslim.
The questioner : The followers do not know.
The Shaykh : The followers have no obligation regarding it.
The questioner : ... prostration.
The Shaykh : They prostrate with him when he prostrates; they must prostrate with him.
The questioner : If he raises his head from prostration and forgets to say: Allahu Akbar, while they are in prostration in this situation.
The Shaykh : Fine.
The questioner : What do you mean? How, so that they stand up?
The Shaykh : Ah, are you asking about the imam or about the follower?
The questioner : About the imam.
The Shaykh : About the imam, if he forgets and stands up, then he should recite al-Fatihah somewhat loudly so that they know he has stood up. As for the takbir, its time has passed; he cannot say it at a time other than its proper time. Yes.
The Shaykh : And whoever heard, and whoever said, yes.
The questioner : If the imam raises his head, meaning he raises his head from prostration, but forgets to say: Allahu Akbar, what does he do in this situation?
The Shaykh : The takbirs of the prayer, other than the takbir of ihram, are obligatory. That is, if a person forgets them, his prayer is valid, but he must perform the prostration for forgetfulness before the taslim.
The questioner : The followers do not know.
The Shaykh : The followers have no obligation regarding it.
The questioner : ... prostration.
The Shaykh : They prostrate with him when he prostrates; they must prostrate with him.
The questioner : If he raises his head from prostration and forgets to say: Allahu Akbar, while they are in prostration in this situation.
The Shaykh : Fine.
The questioner : What do you mean? How, so that they stand up?
The Shaykh : Ah, are you asking about the imam or about the follower?
The questioner : About the imam.
The Shaykh : About the imam, if he forgets and stands up, then he should recite al-Fatihah somewhat loudly so that they know he has stood up. As for the takbir, its time has passed; he cannot say it at a time other than its proper time. Yes.