Chapter on Itikaf and What Fasting Is Obligatory in It
Tahdhīb al-Aḥkām|Volume 4|Book 2|Chapter 27
وَ فِي رِوَايَةِ عَلِيِّ بْنِ اَلْحَسَنِ بْنِ فَضَّالٍ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنِ اَلْحَسَنِ بْنِ مَحْبُوبٍ عَنْ عُمَرَ بْنِ يَزِيدَ: مِثْلَ ذَلِكَ وَ زَادَ فِيهِ» مَسْجِدَ اَلْبَصْرَةِ«.
And in the narration of Ali ibn al-Hasan ibn Faddal, from Muhammad ibn Ali, from al-Hasan ibn Mahbub, from Umar ibn Yazid:
The like of that (in hadith 882), and Imam عليه السلام added in it: “the Mosque of Basra.”
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 4, p. 363
- Ṣaḥīḥ al-Tahdhīb, p. 378