Al-Kāfi - The Book of Fasting

Chapter: The Case of Fasting during Menses: Major or Minor One َّدٍ عَنِ الْحُسَيْنِ بْنِ سَعِيدٍ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنِ الْحُسَيْنِ بْنِ عُثْ٠َّدِ بْنِ جَعْفَرٍ قَالَ قُلْتُ لأَبِي الْحَسَنِ (عَلَيْهِ السَّلاَ٠ْرَأَتِي جَعَلَتْ عَلَى نَفْسِهَا صَوْ٠َ شَهْرَيْنِ فَوَضَعَتْ وَلَدَهَا وَأَدْرَكَهَا الْحَبَلُ فَلَ٠ْ تَقْوَ عَلَى الصَّوْ٠ِ قَالَ فَلْتَتَصَدَّقْ ٠َكَانَ كُلِّ يَوْ٠11.

Ahmad ibn Muhammad has narrated from al-Husayn ibn Sa‘id from Fadalah ibn Ayyub from al-Husayn ibn ‘Uthman from ibn Muskan from Muhammad ibn Ja’far who has said the following: “I once said to abu al-Hassan (a.s.), that my woman had placed upon herself fasting for two months. She gave birth; then became pregnant. She is not able to fast.

He (the Imam) said, ‘She is required to pay charity of one mud (certain measurement) for everyday to a destitute person.’” جهول - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/344))