4. Muḥammad ibn ‘Abdillāh ibn Ja’far Al-Ḥimyari narrated to me from his father, from Aḥmad ibn Abī ‘Abdillāh Al-Barqi, from his father, from Ḥmmād ibn ‘Isā, from some of our companions, who said: Abū ‘Abdillāh (Imam Sādiq ) said: The following is among the rulings which are reserved (in the Knowledge of Allāh): (a traveler can) establish prayers in full form in four locations: in Makkah, in Madīnah, in the Mosque of Kūfah, and in the Ḥā`ir.