Chapter on Rulings on Forgetfulness (Sahw) in Prayer and What Requires Repeating of Prayer
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 10
Tahdhīb al-Aḥkām
Volume 2, Book 1, Chapter 10
Chapter on Rulings on Forgetfulness (Sahw) in Prayer and What Requires Repeating of Prayer
وَ عَنْهُ عَنِ اَلْحَسَنِ عَنْ زُرْعَةَ بْنِ مُحَمَّدٍ عَنِ اَلْحَضْرَمِيِّ عَنْ سَمَاعَةَ قَالَ: سَأَلْتُهُ عَنِ اَلسَّهْوِ فِي صَلاَةِ اَلْغَدَاةِ قَالَ «إِذَا لَمْ تَدْرِ وَاحِدَةً صَلَّيْتَ أَمْ ثِنْتَيْنِ فَأَعِدِ اَلصَّلاَةَ مِنْ أَوَّلِهَا وَ اَلْجُمُعَةُ أَيْضاً إِذَا سَهَا فِيهَا اَلْإِمَامُ فَعَلَيْهِ أَنْ يُعِيدَ اَلصَّلاَةَ لِأَنَّهَا رَكْعَتَانِ وَ اَلْمَغْرِبُ إِذَا سَهَا فِيهَا وَ لَمْ يَدْرِ كَمْ رَكْعَةً صَلَّى فَعَلَيْهِ أَنْ يُعِيدَ اَلصَّلاَةَ»
And from him, from al-Hasan, from Zur‘ah bin Muhammad, from al-Hadrami, from Sama‘ah, who said:
I asked Him عليه السلام about forgetfulness in the Fajr prayer. Imam عليه السلام said: "If you do not know whether you prayed one rak‘ah or two, then repeat the prayer from the beginning. And Jumu‘ah also, if the Imam (of prayer) is forgetful in it, then he must repeat the prayer, because it is two rak‘ahs. And Maghrib, if one is forgetful in it and does not know how many rak‘ahs he prayed, then he must repeat the prayer."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 190
- Ṣaḥīḥ al-Tahdhīb, p. 227