Al-Kāfi

Hadith 1805
congregational-prayer
2ـ الْحُسَيْنُ بْنُ مُحَمَّدٍ عَنْ مُعَلَّى بْنِ مُحَمَّدٍ عَنِ الْوَشَّاءِ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنْ مَعْمَرِ بْنِ يَحْيَى عَنْ أَبِي جَعْفَرٍ (عَلَيْهِ الْسَّلام) قَالَ لاَ صَلاَةَ يَوْمَ الْفِطْرِ وَالأضْحَى إِلاَّ مَعَ إِمَامٍ.
2. Al-Husayn ibn Muhammad has narrated from Mu‘alla’ ibn Muhammad from al-Washsha’ from Hammad ibn ‘Uthaman from Ma‘mar ibn Yahya who has said the following: “Abu Ja‘far (a.s.), has said, ‘There is not any Salah (prayer) on the day of al-Fitr or al- Adha’ except with Imam.”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī