Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.

Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 9

Tahdhīb al-Aḥkām

Volume 2, Book 1, Chapter 9

Chapter on the Detailed Explanation of Prayer, Including the Obligatory and Recommended, and What is Permissible and Not Permissible.

Hadith #39

وَ عَنْهُ عَنْ فَضَالَةَ عَنْ رِفَاعَةَ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: سَأَلْتُهُ عَنْ رَجُلٍ يَنْسَى أَنْ يَرْكَعَ حَتَّى يَسْجُدَ وَ يَقُومَ قَالَ« يَسْتَقْبِلُ»

And from him, from Fadalah from Rifa’ah from Abu Abdillah , who said: I asked Him about a man who forgets to bow until he prostrates and stands up again. Imam said: "He must begin the prayer anew."

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 157