Seclusion while Fasting
عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ سُئِلَ عَنِ الِاعْتِكَافِ قَالَ لَا يَصْلُحُ الِاعْتِكَافُ إِلَّا فِي الْمَسْجِدِ الْحَرَامِ أَوْ مَسْجِدِ الرَّسُولِ ( صلى الله عليه وآله ) أَوْ مَسْجِدِ الْكُوفَةِ أَوْ مَسْجِدِ جَمَاعَةٍ وَ تَصُومُ مَا دُمْتَ مُعْتَكِفاً
Ali Bin Ibrahim, from his father, from Ibn Abu Umeyr, from Hammad, from Al Halby,
(It has been narrated) from Abu Abdullah-asws, having said, about the Itikaaf: ‘The Itikaaf is not correct except in the Sacred Masjid, or Masjid of the Rasool-saww, or Masjid of Al-Kufa, or a general Masjid, and you should be Fasting for as long as you are in Itikaaf’.[1]
[1] Al Kafi – V 4 – The Book of Fasts Ch 78 H 3