Chapter on the Rulings of Congregational Prayer (the Minimum Number for Congregational Prayer, the Description of the Imam, Who Is to Be Followed and Who Is Not to Be Followed, Recitation Behind Both of Them, the Rulings of Those Led in Prayer, and Other Such Rulings Related to It)

Tahdhīb al-Aḥkām|Volume 3|Book 1|Chapter 3

Tahdhīb al-Aḥkām

Volume 3, Book 1, Chapter 3

Chapter on the Rulings of Congregational Prayer (the Minimum Number for Congregational Prayer, the Description of the Imam, Who Is to Be Followed and Who Is Not to Be Followed, Recitation Behind Both of Them, the Rulings of Those Led in Prayer, and Other Such Rulings Related to It)

Hadith #78

رَوَى مُحَمَّدُ بْنُ أَحْمَدَ بْنِ يَحْيَى عَنِ اَلْعَبَّاسِ بْنِ مَعْرُوفٍ عَنْ صَفْوَانَ عَنْ أَبِي عُثْمَانَ عَنْ مُعَلَّى بْنِ خُنَيْسٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ:« إِذَا سَبَقَكَ اَلْإِمَامُ بِرَكْعَةٍ فَأَدْرَكْتَهُ وَ قَدْ رَفَعَ رَأْسَهُ فَاسْجُدْ مَعَهُ وَ لاَ تَعْتَدَّ بِهَا»

Muhammad ibn Ahmad ibn Yahya narrated from al-Abbas ibn Maruf from Safwan from Abu Uthman from Mualla ibn Khunays from Abu Abdillah , peace be upon him, who said: Imam al-Sadiq said: “If the imam (of prayer) precedes you by a rak’ah, and you catch up with him after he has raised his head (from rukuh), then prostrate with him, but do not count that (rak’ah).”

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 3, p. 54