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.

Hadith #49

فَضَالَةُ عَنْ حُسَيْنٍ عَنِ اِبْنِ مُسْكَانَ عَنْ أَبِي بَصِيرٍ وَ اَلْحَلَبِيِّ: فِي اَلرَّجُلِ لاَ يَدْرِي أَ رَكَعَ أَمْ لَمْ يَرْكَعْ قَالَ« يَرْكَعُ»

Fadalah from Husayn from Ibn Muskan from Abu Basir and al-Halabi: (Imam was asked) concerning a man who does not know whether he has bowed or not. Imam said: "Let him bow."

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 160