Al-Kāfi

Hadith 1500
congregational-prayerjurisprudence
6ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) قَالَ لاَ أَرَى بِالصُّفُوفِ بَيْنَ الأسَاطِينِ بَأْساً.
6. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad from al-Halabiy who has said the following: “Abu ’Abd Allah (a.s.), has said, ‘I do not see any problem in the rows between the pillars.”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī