Al-Kāfi

Hadith 1467
congregational-prayerquran
5ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ حَدِيدٍ عَنْ جَمِيلٍ عَنْ زُرَارَةَ قَالَ سَأَلْتُ أَحَدَهُمَا (عَلَيْهِما الْسَّلام) عَنِ الإِمَامِ يَضْمَنُ صَلاَةَ الْقَوْمِ قَالَ لاَ.
5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Ali ibn Hadid from Jamil ibn Darraj from Zurarah who has said the following: “I once asked one of the two Imam, ‘Alayhim al-Salam, if the Imam is responsible for Salah (prayer) of the people. He (the Imam) said, ‘No, he is not responsible.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī