A man from the Companions of the Prophet (ﷺ) told me that the Messenger of Allah (ﷺ) prohibited cupping and perpetual fasting, but he had not made them unlawful showing mercy on his Companions. Thereupon he was asked: Messenger of Allah, you observe perpetual fast till dawn. He replied: I observe perpetual fast till dawn (for) my Lord gives me food and drink.
The Prophet (ﷺ) commanded to apply collyrium mixed with musk at the time of sleep. He said: A man who is fasting should abstain from it. Abu Dawud said: Yahya b. Ma'in said to me: This tradition about the use of collyrium is munkar (i.e. contradicts the sound traditions on the subject).
I did not see any of our companions who abominated the use of collyrium by a man who fasting. Ibrahim would permit the man who was fasting to apply collyrium with aloes.
The Prophet (ﷺ) said: if one has a sudden attack of vomiting while one is fasting, no atonement is required of him, but if he vomits intentionally he must make atonement.
حَدَّثَنَا أَبُو مَعْمَرٍ عَبْدُ اللَّهِ بْنُ عَمْرٍو، حَدَّثَنَا عَبْدُ الْوَارِثِ، حَدَّثَنَا الْحُسَيْنُ، عَنْ يَحْيَى، حَدَّثَنِي عَبْدُ الرَّحْمَنِ بْنُ عَمْرٍو الأَوْزَاعِيُّ، عَنْ يَعِيشَ بْنِ الْوَلِيدِ بْنِ هِشَامٍ، أَنَّ أَبَاهُ، حَدَّثَهُ حَدَّثَنِي مَعْدَانُ بْنُ طَلْحَةَ، أَنَّ أَبَا الدَّرْدَاءِ، حَدَّثَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَاءَ فَأَفْطَرَ فَلَقِيتُ ثَوْبَانَ مَوْلَى رَسُولِ اللَّهِ صلى الله عليه وسلم فِي مَسْجِدِ دِمَشْقَ فَقُلْتُ إِنَّ أَبَا الدَّرْدَاءِ حَدَّثَنِي أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَاءَ فَأَفْطَرَ . قَالَ صَدَقَ وَأَنَا صَبَبْتُ لَهُ وَضُوءَهُ صلى الله عليه وسلم .
That Abu ad-Darda' narrated to him: The Messenger of Allah (ﷺ) vomited and broke his fast. Then I met Thawban, the client of the Messenger of Allah (ﷺ), in the mosque in Damascus, I said (to him): Abu al-Darda has told me that the Messenger of Allah (ﷺ) vomited and broke his fast. He said: He spoke the truth ; and I poured out water for his ablution (ﷺ).