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 #4

وَ عَنْهُ عَنِ اَلنَّضْرِ عَنْ مُوسَى بْنِ بَكْرٍ قَالَ: سَأَلَهُ اَلْفُضَيْلُ عَنِ اَلسَّهْوِ فَقَالَ« إِذَا شَكَكْتَ فِي اَلْأُولَيَيْنِ فَأَعِدْ»

And from him, from al-Nadr, from Musa bin Bakr, who said: Al-Fudayl asked Him about forgetfulness (in prayer). Imam said: "If you are doubtful about first two (rak‘ahs), then repeat (the prayer)."

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 187