الكافي- ط الاسلامية, volume 4, page 100

1. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ‘Uthman ibn ‘Isa from Sama‘ah, who has said the following: “I once asked him (the Imam) (a.s.), about the case of a people who fast in the month of Ramadan when they are covered by a black cloud at the time of sunset and they think it is night, and discontinue their fast, then the cloud clears and the sun is there. He (the Imam) said, ‘Those who discontinued their fast are required to make Qada’ (compensatory fast) that fast; Allah, most Majestic, most Glorious, says, ‘Complete fasting by the night.’ Those who eat before the night are required to make Qada’ (compensatory fast) because it is knowingly eating.’”

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

2. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa ibn ‘Ubayd from Yunus from abu Basir and Sama‘ah, who has said the following: “This is about the case of a people who fast in the month of Ramadan when they are covered by a black cloud at the time of sunset and they think it is night and discontinue their fast; then the cloud clears and the sun is there. Abu ‘Abd Allah (a.s.), has said, ‘Those who discontinued their fast are required to make Qada’ (compensatory fast) that fast; Allah, most Majestic, most Glorious, says, ‘Complete fasting by the night.’ (2:187) Those who eat before it is the night, are required to make Qada’ (compensatory fast) because it is knowingly eating.’”

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

1. A number of our people have narrated from Sahl ibn Ziyad from Muhammad ibn ‘Isa ibn ‘Ubayd from Ibn Abi ‘Umayr from those whom he has mentioned who has said the following: “Abu ‘ Abd Allah (a.s.), has said, ‘At the time of the fall of the disc (sunset) and obligatory breakfast, one can stand in front of al-Qiblah (al-Ka‘bah) and look for the redness that rises from the east. When it (redness) passes overhead toward the west, breaking fast becomes obligatory and the disk has fallen (it is sunset).’”

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

2. Ali ibn Ibrahim has narrated from his father from and a number of our people have narrated from Ahmad ibn Muhammad from all from Ibn Abi ‘Umayr from al-Qasim ibn ‘Urwah from Burayd ibn Mu‘awiyah who has said the following: “I once heard abu Ja‘far (a.s.), say, ‘When the redness disappears from this side (the east), it is sunset all over the east and west of the earth (land).”’

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