مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ السَّيَّارِيِّ قَالَ:
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كَتَبَ مُحَمَّدُ بْنُ الْفَرَجِ إِلَى الْعَسْكَرِيِّ ع يَسْأَلُهُ عَمَّا رُوِيَ مِنَ الْحِسَابِ فِي الصَّوْمِ عَنْ آبَائِكَ فِي عَدِّ خَمْسَةِ أَيَّامٍ بَيْنَ أَوَّلِ السَّنَةِ الْمَاضِيَةِ وَ السَّنَةِ الثَّانِيَةِ الَّتِي تَأْتِي فَكَتَبَ صَحِيحٌ وَ لَكِنْ عُدَّ فِي كُلِّ أَرْبَعِ سِنِينَ خَمْساً وَ فِي السَّنَةِ الْخَامِسَةِ سِتّاً فِيمَا بَيْنَ الْأُولَى وَ الْحَادِثِ وَ مَا سِوَى ذَلِكَ فَإِنَّمَا هُوَ خَمْسَةٌ خَمْسَةٌ قَالَ السَّيَّارِيُّ وَ هَذِهِ مِنْ جِهَةِ الْكَبِيسَةِ قَالَ وَ قَدْ حَسَبَهُ أَصْحَابُنَا فَوَجَدُوهُ صَحِيحاً قَالَ وَ كَتَبَ إِلَيْهِ مُحَمَّدُ بْنُ الْفَرَجِ فِي سَنَةِ ثَمَانٍ وَ ثَلَاثِينَ وَ مِائَتَيْنِ هَذَا الْحِسَابُ لَا يَتَهَيَّأُ لِكُلِّ إِنْسَانٍ أَنْ يَعْمَلَ عَلَيْهِ إِنَّمَا هَذَا لِمَنْ يَعْرِفُ السِّنِينَ وَ مَنْ يَعْلَمُ مَتَى كَانَتِ السَّنَةُ الْكَبِيسَةُ ثُمَّ يَصِحُّ لَهُ هِلَالُ شَهْرِ رَمَضَانَ أَوَّلَ لَيْلَةٍ فَإِذَا صَحَّ الْهِلَالُ لِلَيْلَتِهِ وَ عَرَفَ السِّنِينَ صَحَّ لَهُ ذَلِكَ إِنْ شَاءَ اللَّهُ.
Read English translationHide English translationMuhammad Sarwar — attributed by Thaqalayn
3. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from al-Sayyariy who has said the following: “Muhammad ibn al-Faraj once wrote to al-‘Askariy (a.s.), asking about what is narrated, for calculating to fast, from his ancestors about the five days of the last year and six days of the coming year. He (the Imam) wrote, ‘It is correct but count five days in every four years and in the sixth year six days in between the first and the new. In those other than this it is five and five.’ Al- Sayyariy has said that this is because of al-Kabisah (calculating system). He has said that our people have calculated it and they found it to be correct.’ He (the narrator) has said that Muhammad ibn al- Faraj wrote to him (the Imam) in the year two hundred thirty eight about this calculation. (The answer said), ‘This calculation is not easy for everyone to follow. This is for those who know the years and that when al-Kabisah year was. Then crescent of the month of Ramadan of the first night is correct for them. Once the crescent of the night is established, then it is correct for them by the will of Allah.’”
Translation: Muhammad Sarwar — attributed by Thaqalayn·The Arabic above is the original.
Hadith gradings
1- ضعيفAllamah Baqir al-MajlisiMirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (16/236)
الهوامش · 1⌄
[1]الكبيسة يقال لليوم المجتمع من الكسور فان أهل الحساب يعدون الشهر الأول من السنة ثلاثين و الثاني تسعة و عشرين و هكذا إلى آخر السنة و يجتمعون الكسور حتّى إذا صار يوما أو قريبا منه زادوا في آخر السنة يوما و ذلك يكون في كل ثلاثين سنة أحد عشر يوما.( فى)ص 81