الكافي- ط الاسلامية, volume 4, page 81

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·Thaqalayn link·The Arabic above is the original.

4. A number of our people have narrated from Sahl ibn Ziyad from Mansur ibn al-‘Abbas from Ibrahim al-Ahwal from ’Imran al- Za‘faraniy who has said the following: “I once said to abu ‘Abd Allah (a.s.), ‘In winter we cannot see the sun or stars for one or two days. When must we fast?’ He (the Imam) said, ‘Think, on what day you fasted last year, then count five days and fast on the fifth day.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

1. A number of our people have narrated from Ahmad ibn Muhammad from Hamzah ibn Ya‘liy from Zakariya ibn Adam from al- Kahiliy who has said the following: “I once asked abu ‘ Abd Allah (a.s.), about the case of the day that is not known to be of the month of al-Sha’ban. He (the Imam) said, ’Fasting one day of the month of al-Sha’ban is more beloved to me than losing one day of the month of Ramadan.”’

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.

2. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from Sama‘ah who has said the following: “I once asked him (the Imam) (a.s.), about the case of the day which is doubtful of being of the month of Ramadan and one does not know if it is of al-Sha’ban or of the month of Ramadan. He fasts that day and it was of the month of Ramadan. He (the Imam) said, ‘It was a day when he fortunately fasted and there is no Qada’ (compensatory fast) upon him.’”

Translation: Muhammad Sarwar·Thaqalayn link·The Arabic above is the original.