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.
وَ عَنْهُ عَنْ فَضَالَةَ عَنْ صَفْوَانَ عَنِ اَلْعَلاَءِ عَنْ مُحَمَّدٍ عَنْ أَحَدِهِمَا عَلَيْهِمَا اَلسَّلاَمُ: فِي اَلَّذِي يَذْكُرُ أَنَّهُ لَمْ يُكَبِّرْ فِي أَوَّلِ صَلاَتِهِ فَقَالَ« إِذَا اِسْتَيْقَنَ أَنَّهُ لَمْ يُكَبِّرْ فَلْيُعِدْ وَ لَكِنْ كَيْفَ يَسْتَيْقِنُ»
And from him, from Fadalah from Safwan from al-’Alaʾ from Muhammad from one of the two (Imams عليه السلام), peace be upon them:
(Imam عليه السلام) was asked regarding the one who remembers that he did not say the Takbir at the beginning of his prayer. Imam عليه السلام said: "If he is certain that he did not say the Takbir, then he must repeat (the prayer); but how can he be certain?”
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 152
- Ṣaḥīḥ al-Tahdhīb, p. 196