Congregational Prayer and Its Virtue
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 57
وَ اَلَّذِي رَوَاهُ أَبُو بَصِيرٍ عَنِ اَلصَّادِقِ عَلَيْهِ اَلسَّلاَمُ: حِينَ قَالَ لَهُ أَ يَضْمَنُ اَلْإِمَامُ اَلصَّلاَةَ فَقَالَ «لاَ لَيْسَ بِضَامِنٍ.
Abu Basir narrated from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام that when he asked: "Does the Imam guarantee (the correctness of) the prayer?" Imam عليه السلام replied: "No, he is not a guarantor."
- Ṣaḥīḥ al-Faqīh, p. 58