Prayer During Travel
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 59
وَقَالَ اَلصَّادِقُ عَلَيْهِ اَلسَّلاَمُ: «مِنَ اَلْأَمْرِ اَلْمَذْخُورِ إِتْمَامُ اَلصَّلاَةِ فِي أَرْبَعَةِ مَوَاطِنَ بِمَكَّةَ وَ اَلْمَدِينَةِ وَ مَسْجِدِ اَلْكُوفَةِ، وَ حَائِرِ اَلْحُسَيْنِ عَلَيْهِ اَلسَّلاَمُ.
Imam Jafar ibn Muhammad Al-Sadiq عليه السلام said: "From the reserved rulings is the completion of the prayer in four locations: Mecca, Medina, the Mosque of Kufa, and the Shrine (Haa'ir) of Imam Hussain عليه السلام."
- Ṣaḥīḥ al-Faqīh