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

Hadith #20

وَ عَنْهُ عَنِ اَلنَّضْرِ عَنْ مُوسَى بْنِ بَكْرٍ عَنِ اَلْفُضَيْلِ قَالَ: سَأَلْتُهُ عَنِ اَلسَّهْوِ فَقَالَ« فِي صَلاَةِ اَلْمَغْرِبِ إِذَا لَمْ تَحْفَظْ مَا بَيْنَ اَلثَّلاَثِ إِلَى اَلْأَرْبَعِ فَأَعِدْ صَلاَتَكَ»

And from him, from al-Nadr, from Musa bin Bakr, from al-Fudayl, who said: I asked Him about forgetfulness. Imam said: "In the Maghrib prayer, if you do not remember whether it was three or four (rak‘ahs), then repeat your prayer."

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 190