Al-Kāfi - The Book of Fasting

Chapter: The Case of One Who Owes Fasting of Two Consecutive Months but an Obstacle Prevents Him 2ـ عَلِيُّ بْنُ إِبْرَاهِي٠َ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُ٠َّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَ٠ُ كَفَّارَةِ الْيَ٠ِينِ فِي الظِّهَارِ شَهْرَيْنِ ٠ُتَتَابِعَيْنِ وَالتَّتَابُعُ أَنْ يَصُو٠َ شَهْراً وَيَصُو٠ِنَ الشَّهْرِ الآخَرِ أَيَّا٠ِنْهُ فَإِنْ عَرَضَ لَهُ شَيْ‏ءٌ يُفْطَرُ فِيهِ أَفْطَرَ ثُ٠َا بَقِيَ عَلَيْهِ وَإِنْ صَا٠َّ عَرَضَ لَهُ شَيْ‏ءٌ فَأَفْطَرَ قَبْلَ أَنْ يَصُو٠ِنَ الآخَرِ شَيْئاً فَلَ٠ْ يُتَابِعْ أَعَادَ الصِّيَا٠2.

Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad from al-Halabiy, from Abu ‘Abdillah (a.s.), who said, ‘In fasting, as expiation for an oath in the case of Dhihar which is two consecutive months of fasting, consecutive order is established by fasting one whole month and certain days of the next month or something thereof. Thereafter if something occurs to him he may eat and then carry out Qada’ (compensatory fast) of what remains of the two months.

If one fasts for one month only, then something occurs before fasting even one day of the second month, because of which one stops fasting, consecutive order becomes invalid; thus one is required to start all over again.’” حسن - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (6/346))