Congregational Prayer and Its Virtue
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 57
وَ رَوَى حَفْصُ بْنُ اَلْبَخْتَرِيِّ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: «يَنْبَغِي لِلْإِمَامِ أَنْ يَجْلِسَ حَتَّى يُتِمَّ مَنْ خَلْفَهُ صَلاَتَهُمْ وَ يَنْبَغِي لِلْإِمَامِ أَنْ يُسْمِعَ مَنْ خَلْفَهُ اَلتَّشَهُّدَ وَ لاَ يُسْمِعُونَهُ هُمْ شَيْئاً يَعْنِي اَلشَّهَادَتَيْنِ وَ يُسْمِعَهُمْ أَيْضاً اَلسَّلاَمُ عَلَيْنَا وَ عَلَى عِبَادِ اَللَّهِ اَلصَّالِحِينَ.
Hafs ibn al-Bakhtari narrated from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام who said: "It is appropriate for the Imam to sit until those behind him complete their prayers. The Imam should also recite the tashahhud (testimony of faith) loud enough for those behind him to hear, but they should not make their recitation audible to him—referring to the two testimonies (Shahadatayn). He should also audibly recite 'Peace be upon us and upon the righteous servants of Allah سبحانه وتعالى.'"
- Ṣaḥīḥ al-Faqīh