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 مُحَمَّدِ بْنِ سِنَانٍ عَنِ اِبْنِ مُسْكَانَ وَ فَضَالَةَ عَنْ حُسَيْنٍ عَنِ اِبْنِ مُسْكَانَ عَنْ أَبِي بَصِيرٍ قَالَ: سَأَلْتُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ عَنْ رَجُلٍ شَكَّ وَ هُوَ قَائِمٌ فَلاَ يَدْرِي أَ رَكَعَ أَمْ لَمْ يَرْكَعْ قَالَ« يَرْكَعُ وَ يَسْجُدُ»
And from him, from Muhammad ibn Sinan from Ibn Muskan, and Fadalah from Husayn from Ibn Muskan from Abu Basir, who said:
I asked Abu Abdillah عليه السلام about a man who doubts while he is standing and does not know whether he has bowed or not. Imam عليه السلام said: "Let him bow and prostrate."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 160
- Ṣaḥīḥ al-Tahdhīb, p. 198