Urwa ibn al-Zubayr عروة بن الزبير · Fasting (Kitab Al-Siyam)

The Prophet (ﷺ) said: When any of you hears the summons to prayer while he has a vessel in his hand, he should not lay it down till he fulfils his need.

If I had some part of the fast of Ramadan to make up, I would not be able to atone for it except in Sha'ban.

If a man falls ill during Ramadan and he dies, while he could not keep the fast, food will be provided (for the poor men) on his behalf ; there is no atonement (for his fasts) due from him. If there is some vow which he could not fulfill, his heir must atone on his behalf.

On the day of 'Arafah some people near her argued whether the Messenger of Allah (ﷺ) was fasting, some saying that he was, and others saying that he was not. I, therefore, sent him a cup of milk while he was observing the halt at 'Arafah on his camel, and he drank it.

On the days of the conquest of Mecca, when Mecca was captured, Fatimah came and sat on the left side of the Messenger of Allah (ﷺ), and Umm Hani was on his right side. A slave-girl brought a vessel which contained some drink; she gave it to him and he drank of it. He then gave it to Umm Hani who drank of it. She said: Messenger of Allah, I have broken my fast; I was fasting. He said to…

When one of you is invited (to a meal), and he is fasting, he should say that he is fasting.

The Prophet (ﷺ) used to observe I'tikaf during ten days of Ramadan every year. But when the year in which he died, he observed I'tikaf for twenty days.

When the Messenger of Allah (ﷺ) observed I'tikaf, he would put his head near me, and I would comb it. and he entered the house only to fulfill human needs (i.e. to urinate or to relieve himself).

And Yunus also narrated in a similar way from al-Zuhri, and no one supported Malik in his narration from 'Urwah from 'Umrah ; and Ma'mar, Ziyad b. Sad and others have also narrated it from al-Zuhri from 'Urwah on the authority of 'Aishah.

According to the version of Al Nufaili, A’ishah said “The Prophet (ﷺ) used to pass by a patient while he was observing I’tikaf(in the mosque) but he passed as usual and did not stay asking about him.” According to the version of Ibn Isa she said “The Prophet (ﷺ) would visit a patient while he was observing I’tikaf.”