The Sufficient (Vol 4) · Hadith 682 (#Ḥadīth #1)
Chapter 78 | Kinds of Masjid Where ’Ttikaf Is Valid
1ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنِ الْحَسَنِ بْنِ مَحْبُوبٍ عَنْ عُمَرَ بْنِ يَزِيدَ قَالَ قُلْتُ لأَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) مَا تَقُولُ فِي الاعْتِكَافِ بِبَغْدَادَ فِي بَعْضِ مَسَاجِدِهَا فَقَالَ لا اعْتِكَافَ إِلاَّ فِي مَسْجِدِ جَمَاعَةٍ قَدْ صَلَّى فِيهِ إِمَامٌ عَدْلٌ بِصَلاةِ جَمَاعَةٍ وَلا بَأْسَ أَنْ يُعْتَكَفَ فِي مَسْجِدِ الْكُوفَةِ وَالْبَصْرَةِ وَمَسْجِدِ الْمَدِينَةِ وَمَسْجِدِ مَكَّةَ.
1. A number of our people have narrated from Sahl ibn Ziyad from al-Hassan ibn Mahbub from ‘Umar ibn Yazid who has said the following: “I once asked abu ‘Abd Allah , about performing Ttikaf in a certain Masjid of Baghdad. He (the Imam) said, ’Without a Masjid in which Salat (prayer) in congregation is held behind a just Imam, Ttikaf is not valid. It is not harmful to do Ttikaf in Masjid of al-Kufah, in al- Basrah, in al-Madinah or Makkah.’”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).