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

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)

رَوَى ذَلِكَ أَحْمَدُ بْنُ مُحَمَّدِ بْنِ عِيسَى عَنِ اَلْحَجَّالِ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ:« يَنْبَغِي لِلْإِمَامِ أَنْ يُسْمِعَ مَنْ خَلْفَهُ كُلَّ مَا يَقُولُ وَ لاَ يَنْبَغِي لِمَنْ خَلْفَهُ أَنْ يُسْمِعَهُ شَيْئاً مِمَّا يَقُولُ»

This was narrated by Ahmad ibn Muhammad ibn Isa from al-Hajjal from Hammad ibn Uthman from Abu Basir from Abu Abdillah , peace be upon him, who said: Imam al-Sadiq said: “It is proper for the imam (of prayer) to make audible to those behind him everything he says, and it is not proper for those behind him to make anything they say audible to him.”

Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 3, p. 54
Shaykh Baqir al-Behbudi
Ṣaḥīḥ al-Tahdhīb, p. 269

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)

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 #82