The ruling on one who forgets the prostration of the first rak'ah and then remembers it after beginning the recitation of al-Fatihah
Machine translationRead the Arabic original
The questioner:
Honorable Shaykh, may Allah grant you success. A questioner says: If a person praying alone stands up for the second rak'ah, having forgotten the second prostration of the first rak'ah, and he settles into standing and begins al-Fatihah, does he go back and perform the prostration?
The Shaykh:
If he begins the recitation, the first rak'ah is invalid. He based the beginning of his prayer on this rak'ah, and he does not go back after he begins the recitation, because he has begun a pillar, so he does not retreat from it.
The presenter:
Honorable Shaykh, may Allah grant you success.
The Shaykh:
So the first rak'ah is invalid, and the second takes its place. Yes.
Honorable Shaykh, may Allah grant you success. A questioner says: If a person praying alone stands up for the second rak'ah, having forgotten the second prostration of the first rak'ah, and he settles into standing and begins al-Fatihah, does he go back and perform the prostration?
The Shaykh:
If he begins the recitation, the first rak'ah is invalid. He based the beginning of his prayer on this rak'ah, and he does not go back after he begins the recitation, because he has begun a pillar, so he does not retreat from it.
The presenter:
Honorable Shaykh, may Allah grant you success.
The Shaykh:
So the first rak'ah is invalid, and the second takes its place. Yes.
Source
قناة «العلامة الدكتور صالح الفوزان»، 1634- حكم من نسي سجود الركعة الأولى ثم تذكّره بعد شروعه في قراءة الفاتحة - صالح الفوزان — youtube.com
The Arabic text is a machine transcription of the audio recording.