Sufyan bin Sa‘id Ath-Thawri سفيان الثوري · Fasting (Kitab Al-Siyam)

The Prophet (ﷺ) as saying: Fast is a shield ; when one of you is fasting, he should neither behave in an obscene manner nor foolishly. If a man fights or abuses him, he should say: I am fasting, I am fasting.

The Messenger of Allah (ﷺ) had himself cupped when he was fasting and wearing ihram (pilgrim garb).

We would not allow a man who was fasting to get himself cupped due to abomination of hardship.

The Prophet (ﷺ) used to kiss (me) during the month of fasting.

A man said to Messenger of Allah (ﷺ): Messenger of Allah, I was overtaken by dawn while I was sexually defiled, and I want to keep fast. The Messenger of Allah (ﷺ) said: I am also overtaken by dawn while I am in the state of sexual defilement ; I also want to keep fast. I take a bath and I keep fast. The man said: Messenger of Allah, you are not like us ; Allah has forgiven you your…

The Prophet (ﷺ) said: If anyone breaks his fast one day in Ramadan without a concession granted to him by Allah, a perpetual fast will not atone for it.

The Prophet (ﷺ) as saying: If anyone dies when some fast is due from him (i.e. which he could not keep) his heir must fast on his behalf. Abu Dawud said: This applies to the fast which a man vows ; and this is the opinion of Ahmad b. Hanbal.

The Messenger of Allah (ﷺ) said: He who does not determine to fast before dawn does not fast.

When one of you receives an invitation (for a meal), he should accept it. If he isn to fasting, he should eat, and if he is fasten, he should pray. Hisham said: The word salat means to pray (for him to Allah). Abu Dawud said: This tradition has also been narrated by Hafs b. Ghiyath from Hisham.