31-103 According to the same documentation, Ali ibn Abi Talib (a.s.) said, “No one can go into seclusion in the mosque without fasting.”
103 - وَبِهذَا الإِسنادِ قالَ
قالَ عَلِىُّ بْنِ أَبِي طالِبٍعَلَيْهِ السَّلامُ: لا اعتِكافَ إِلاّ بِالصَّومِ.
Similar narrations
Al-Kāfi #683“Abu ‘ Abd Allah (a.s.), has said, ‘Without passing the twentieth day of the month of Ramadan Ttikaf is not valid.’ He (the Imam) then said...