The Prayer of the Two Eids
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 79
وَ رَوَى عَلِيُّ بْنُ رِئَابٍ عَنْ أَبِي بَصِيرٍ عَنْ أَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ قَالَ: «لاَ يَنْبَغِي أَنْ تُصَلَّى صَلاَةُ اَلْعِيدَيْنِ فِي مَسْجِدٍ مُسَقَّفٍ وَ لاَ فِي بَيْتٍ إِنَّمَا تُصَلَّى فِي اَلصَّحْرَاءِ أَوْ فِي مَكَانٍ بَارِزٍ.
Ali ibn Ri'ab narrated from Abu Basir from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام who said: "It is not appropriate for the Eid prayers to be performed in a covered mosque or in a house; rather, they should be prayed in the open air or in an exposed place."
- Ṣaḥīḥ al-Faqīh, p. 72