يُكَفِّرُ عَنْ كُلِّ يَوْمٍ بِمُدِّ حِنْطَةٍ أَوْ شَعِيرٍ.
“Once we asked al-Rida’ (a.s.), about a man who makes a vow that if he is released from jail, he will fast the same day but he is unable to do so because of illness or other reasons, and during his life time he becomes indebted to carry out many days of fasting. What is the expiation for such fast? He (the Imam) said,